Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Receivables From Prior Servicers, Forward Loan Portfolio Receivables From Prior Servicers, Forward Loan Portfolio [Member] Receivables From Prior Servicers, Forward Loan Portfolio [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Account receivables Accounts Receivable, Net Cumulative incurred losses related to advances and other receivables associated with inactive and liquidated loans Gain (Loss) On Advances And Other Receivables Related To Inactive And Liquidated Loans Gain (Loss) On Advances And Other Receivables Related To Inactive And Liquidated Loans Reverse Mortgage Interests [Abstract] Reverse Mortgage Interests [Abstract] Reverse Mortgage Interests Reserves [Roll Forward] Reverse Mortgage Interests Reserves [Roll Forward] Reverse Mortgage Interests Reserves [Roll Forward] Reserves for reverse mortgage interests - beginning of period Reverse Funded Loan Advances, Reserves Reverse Funded Loan Advances, Reserves Provision Reverse Mortgage Reserves, Period Increase Through Provision for Loan Loss Adjustments Reverse Mortgage Reserves, Period Increase Through Provision for Loan Loss Adjustments Charge-offs Reverse Mortgage Reserves, Period Decrease Related to Charge Offs Reverse Mortgage Reserves, Period Decrease Related to Charge Offs Reserves for reverse mortgage interests - end of period Fair Value Disclosures [Abstract] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Mortgage servicing rights Mortgage Servicing Right [Member] Mortgage Servicing Right [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Excess spread financing Excess Spread Financing [Member] Excess Spread Financing [Member] Mortgage servicing rights financing Mortgage Servicing Right Liability [Member] Mortgage Servicing Right Liability Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Total gains or losses included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Dispositions Ending balance Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Total gains or losses included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Dispositions Ending balance Debt Disclosure [Abstract] Schedule of Notes Payable Schedule of Debt [Table Text Block] Schedule of Unsecured Senior Notes Schedule of Unsecured Senior Notes [Table Text Block] [Table Text Block] for Schedule of Unsecured Senior Notes [Table] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Other Nonrecourse Debt Schedule Of Other Nonrecourse Debt [Table Text Block] Schedule Of Other Nonrecourse Debt [Table Text Block] Variable Interest Entities and Securitizations [Abstract] Variable Interest Entities and Securitizations Total certificate balances Qualitative and Quantitative Information, Transferor's Continuing Involvement, Certificate Balances Qualitative and Quantitative Information, Transferor's Continuing Involvement, Certificate Balances Total collateral balances Qualitative and Quantitative Information, Transferor's Continuing Involvement, Collateral Balances Qualitative and Quantitative Information, Transferor's Continuing Involvement, Collateral Balances Unconsolidated securitization trusts Financing Receivable, Recorded Investment, Past Due Unconsolidated securitization trusts Financing Receivable, Recorded Investment, Credit Losses Financing Receivable, Recorded Investment, Credit Losses Payables and Accruals [Abstract] Payables to servicing and subservicing investors Financial Services Liabilities Loans subject to repurchase from Ginnie Mae Assets Sold under Agreements to Repurchase, Repurchase Liability Taxes Taxes Payable Accrued interest Interest Payable Payable to insurance carriers and insurance cancellation reserves Accrued Insurance Accrued bonus and payroll Accrued Salaries Payable to GSEs and securitized trusts Accounts Payable, Government Sponsored Entity Accounts Payable, Government Sponsored Entity Professional and legal Accrued Professional Fees Lease obligations Capital Lease Obligations Accrued liabilities and accounts payable Accrued Liabilities MSR purchases payable including advances Purchase of Mortgage Servicing Rights Payable Purchase of Mortgage Servicing Rights Payable Repurchase reserves Repurchase Reserve Repurchase Reserve Other Other Accrued Liabilities Total payables and accrued liabilities Accounts Payable and Accrued Liabilities Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] RSUs Restricted Stock Units (RSUs) [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Tranche One Share-based Compensation Award, Tranche One [Member] Tranche Two Share-based Compensation Award, Tranche Two [Member] Tranche Three Share-based Compensation Award, Tranche Three [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Certain Employees Certain Employees [Member] Certain Employees [Member] Class of Stock [Line Items] Class of Stock [Line Items] Amount authorized to be repurchased Stock Repurchase Program, Authorized Amount Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Compensation expense Allocated Share-based Compensation Expense Condensed Financial Information of Parent Company Only Disclosure [Abstract] Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Nationstar Parent Company [Member] Issuer Subsidiary Issuer [Member] Guarantor (Subsidiaries) Guarantor Subsidiaries [Member] Non-Guarantor (Subsidiaries) Non-Guarantor Subsidiaries [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Eliminations Consolidation, Eliminations [Member] Condensed Financial Statements Condensed Financial Statements, Captions [Line Items] Assets Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Mortgage servicing rights Servicing Asset Advances and other receivables, net Advances and Other Receivables, Net Advances and Other Receivables, Net Reverse mortgage interests, net Reverse Funded Loan Advances Reverse funded loan advances Mortgage loans held for sale Mortgages Held-for-sale, Fair Value Disclosure Total mortgage loans held for investment, net Mortgage Loans Held for Investment Subject to Nonrecourse Debt Legacy Assets Net Mortgage loans held for investment, subject to nonrecourse debt - Legacy Assets, net of allowance for loan losses, respectively Property and equipment, net Property, Plant and Equipment, Net Derivative financial instruments at fair value Derivative Asset Other assets Other Assets Investment in subsidiaries Investment in Consolidated Subsidiaries Investment in Consolidated Subsidiaries Total assets Assets Liabilities and shareholders' equity Liabilities and Equity [Abstract] Unsecured senior notes Unsecured Debt Advance facilities Secured Debt Warehouse facilities Notes Payable, Fair Value Disclosure Payables and accrued liabilities MSR related liabilities - nonrecourse at fair value Mortgage Serving Rights Liability, carried at fair value Mortgage Serving Rights Liability, carried at fair value Mortgage servicing liabilities Mortgage Servicing Liabilities Mortgage Servicing Liabilities Derivative financial instruments at fair value Derivative Liability Other nonrecourse debt Non-Recourse Debt Payables to affiliates Due to Affiliate Total liabilities Liabilities Total stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and stockholders' equity Liabilities and Equity Transfers and Servicing [Abstract] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table] Change in Discount Rate [Axis] Change in Discount Rate [Axis] Change in Discount Rate [Axis] Change in Discount Rate [Domain] Change in Discount Rate [Domain] Change in Discount Rate [Domain] 100 Basis Points One Hundred Basis Points [Member] One Hundred Basis Points [Member] 200 Basis Points Two Hundred Basis Points [Member] Two Hundred Basis Points [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items] Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items] Discount Rate, Adverse Change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Discount Rate Total Prepayment Speeds, 10% Adverse Change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Total Prepayment Speeds, 20% Adverse Change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Organization, Consolidation and Presentation of Financial Statements [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Assets and Lease Obligations Assets and Lease Obligations [Member] Assets and Lease Obligations [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Excess tax benefits Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Cumulative effect on dilutive earnings per share (in dollars per share) New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share Effect of accounting adoption New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Mortgage Loans Held for Sale and Investment [Abstract] Mortgage Loans Held for Sale and Investment Mortgage loans held for sale – unpaid principal balance Loans Held-for-Sale, Mortgages, Unpaid Principal Balance Loans Held-for-Sale, Mortgages, Unpaid Principal Balance Mark-to-market adjustment Loans Held-for-Sale, Mortgages, Fair Value Adjustment Loans Held-for-Sale, Mortgages, Fair Value Adjustment Total mortgage loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage UPB Mortgage Loans Held for Sale, Nonaccrual Basis Unpaid Principal Balance Mortgage Loans Held for Sale, Nonaccrual Basis Unpaid Principal Balance Fair Value Fair Value, Mortgage Loans Held for Sale non-accrual status Fair Value, Mortgage Loans Held for Sale non-accrual status Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] REO loans with government guarantee Real Estate Owned Loans, Government Guarantee Real Estate Owned Loans, Government Guarantee Servicing advances Servicing Advances Servicing Advances Receivables from agencies, investors and prior servicers Government Sponsored Entity and Investor Receivable Government Sponsored Entity and Investor Receivable Reserves Advances and Other Receivables, Reserves Advances and Other Receivables, Reserves Total advances and other receivables, net Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] IRLCs Interest Rate Lock Commitments [Member] Forward sales of MBS Forward Contracts [Member] LPCs Loan Purchase Commitments [Member] Treasury futures Future [Member] Eurodollar futures Eurodollar Future [Member] Interest rate swaps and caps Interest Rate Swap [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] ASSETS Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Mortgage servicing rights Servicing Asset at Fair Value, Amount Derivative financial instruments Derivative Asset, Fair Value, Gross Asset Total assets Assets, Fair Value Disclosure LIABILITIES Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Excess spread financing Excess Spread Financing at Fair Value Excess spread financing (at fair value) Mortgage servicing rights financing liability - fair value Mortgage Servicing Rights Liability Resulting from Sale of Servicer Advances, Rights not Accounted for as a Sale Mortgage Servicing Rights Liability Resulting from Sale or Securitization of Servicer Advances, Rights not Accounted for as a Sale Fair Value - Liability Derivative Liability, Fair Value, Gross Liability Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Derivative instruments at fair value, less than Derivative Instruments in Hedges, at Fair Value, Net Owned Serviced Loans [Table] Subserviced Loans [Table] Subserviced Loans [Table] Servicing Assets and Servicing Liabilities Risk [Axis] Servicing Assets and Servicing Liabilities Risk [Axis] Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain] Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain] Credit Sensitive Credit Risk [Member] Interest Rate Sensitive Interest Rate Risk [Member] Owned Service Loans [Line Items] Subserviced Loans [Line Items] Subserviced Loans [Line Items] Principal amount outstanding on mortgage servicing rights Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement Mortgage servicing rights at fair value Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Participating Interest Financing Participating Interest Financing [Member] Participating Interest Financing [Member] Trust 2015-2 2015-2 HECM Securitization [Member] 2015-2 HECM Securitization [Member] Trust 2016-1 2016-1 HECM Securitization [Member] 2016-1 HECM Securitization [Member] Trust 2016-2 2016-2 HECM Securitization [Member] 2016-2 HECM Securitization [Member] Trust 2016-3 2016-3 HECM Securitization [Member] 2016-3 HECM Securitization [Member] Legacy Asset Legacy Asset [Member] Legacy Asset [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Advances and other receivables, net Services Advances, Net, Fair Value Disclosure Services Advances, Net, Fair Value Disclosure Mortgage loans held for investment, net Financial liabilities Mortgage servicing rights financing liability Derivative financial instruments Excess spread financing Excess Spread Financing, Fair Value Disclosure Excess Spread Financing, Fair Value Disclosure Advances and Other Receivables, Net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Statement of Financial Position [Abstract] Mortgage servicing rights, $3,168, and $3,160 at fair value, respectively Advances and other receivables, net of reserves of $208 and $184, respectively Reverse mortgage interests, net of reserves of $137 and $131, respectively Mortgage loans held for sale at fair value Mortgage loans held for investment, net Property and equipment, net of accumulated depreciation of $130 and $118, respectively Liabilities and stockholders' equity Unsecured senior notes, net Advance facilities, net Warehouse facilities, net Mortgage servicing liabilities Servicing Liability at Amortized Cost, Balance Other nonrecourse debt, net Commitments and contingencies (Note 15) Commitments and Contingencies Preferred stock at $0.01 par value - 300,000 thousand shares authorized, no shares issued and outstanding Preferred Stock, Value, Issued Common stock at $0.01 par value - 1,000,000 thousand shares authorized, 109,915 thousand and 109,915 thousand shares issued, respectively Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Treasury shares at cost 12,148 thousand and 12,418 thousand shares, respectively Treasury Stock, Value Total Nationstar stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Total stockholders' equity Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] Balance - beginning of period Loans Receivable Held-for-sale, Amount Mortgage loans originated and purchased, net of fees Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Additions to Held-for-sale Loans sold Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Deductions from Held-for-sale Repurchase of loans out of Ginnie Mae securitizations Repurchase of Ginnie Mae Receivables Repurchase of Ginnie Mae Receivables Transfer of mortgage loans held for sale to advances/accounts receivable related to claims Claims Made to Third Parties Claims Made to Third Parties Net transfer of mortgage loans held for sale from REO in other assets Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Transfer from Held-for-sale to Held For Investment or Other Assets Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Transfer from Held-for-sale to Held For Investment or Other Assets Changes in fair value Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Changes in Fair Value Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Changes in Fair Value Other Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Other Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Other Balance - end of period Schedule of Payables and Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of Loans Subject to Repurchase Reserve Schedule of Loans Subject to Repurchase Reserve [Table Text Block] Schedule of Loans Subject to Repurchase Reserve [Table Text Block] Mortgage Banking [Abstract] Minimum net worth required for compliance Minimum Net Worth Required for Compliance Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Basis of Consolidation Consolidation, Policy [Policy Text Block] Recent Accounting Guidance Adopted New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Fair Value Measurement, Policy [Policy Text Block] Income Statement [Abstract] Revenues: Revenues [Abstract] Service related, net Fees and Commissions, Mortgage Banking and Servicing Net gain on mortgage loans held for sale Gain (Loss) on Sales of Loans, Net Total revenues Revenues Expenses: Operating Expenses [Abstract] Salaries, wages and benefits Labor and Related Expense General and administrative General and Administrative Expense Total expenses Operating Expenses Other income (expenses): Nonoperating Income (Expense) [Abstract] Interest income Interest Income, Other Interest expense Interest Expense Other expense Other Nonoperating Income (Expense) Total other income (expenses), net Nonoperating Income (Expense) Income (loss) before income tax expense (benefit) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Less: Income tax expense (benefit) Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: Net income (loss) attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to Nationstar Net Income (Loss) Attributable to Parent Net income (loss) per common share attributable to common stockholders: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average shares of common stock outstanding (in thousands): Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect of stock awards (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Reverse Mortgage Interest Reverse Mortgage Interest [Table Text Block] Reverse Mortgage Interest [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Capital Requirements Regulatory Capital Requirements for Mortgage Companies Disclosure [Text Block] Income Tax Disclosure [Abstract] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Guarantor Financial Statement Information Guarantor Financial Statement Information Disclosure [Text Block] Guarantor Financial Statement Information Securitizations and Financings Variable Interest Entities and Securitizations [Text Block] Variable Interest Entities and Securitizations Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Litigation and Regulatory Matters Litigation and Regulatory Matters [Member] Litigation and Regulatory Matters [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Warehouse facilities, net of unamortized debt issuance costs Reverse Mortgages [Member] Reverse Mortgages [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Legal fees Legal Fees Estimate of possible loss Loss Contingency, Estimate of Possible Loss Civil penalties Litigation Settlement, Amount Unfunded advance obligations Off-balance Sheet, Maximum Advance Obligation of Reverse Mortgages Serviced Off-balance Sheet, Maximum Advance Obligation of Reverse Mortgages Serviced Mortgage loans held for investment, net Mortgage Loans Held for Investment [Member] Mortgage Loans Held for Investment [Member] Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Balance - beginning of the period Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Accretion Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Reclassifications from non-accretable discount Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Balance - end of the period Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) attributable to Nationstar Reconciliation of net income (loss) to net cash attributable to operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Noncontrolling interest (Gain)/loss from subsidiaries Intercompany Gains (Losses) Intercompany Gains (Losses) Net gain on mortgage loans held for sale Gain (Loss) on Sale of Mortgage Loans Reverse loan interest income Interest Income, Reverse Mortgages Interest Income, Reverse Mortgages Loss on liquidation of reverse loans Gain (Loss) On Reverse Mortgage Liquidation Gain (Loss) On Reverse Mortgage Liquidation Provision for servicing reserves Provision for Reserves on Advance and Other Receivables Provision for Reserves on Advance and Other Receivables Fair value changes and amortization of mortgage servicing rights Mortgage Servicing Rights (MSR) Impairment (Recovery) Fair value changes in mortgage loans held for sale Increase (Decrease) in Mortgage Loans Held-for-sale Fair value changes in excess spread financing Fair Value Changes in Excess Financing Spread Fair value changes in excess spread financing Fair value changes in mortgage servicing rights financing liability Fair Value Changes in MSR Financing Liability Fair Value Changes in mortgage servicing rights financing liability Amortization (accretion) of premiums (discounts) Accretion (Amortization) of Discounts and Premiums, Investments Other loss Operating Activities, Other Income (Loss) Operating Activities, Other Income (Loss) Depreciation and amortization Depreciation, Depletion and Amortization Share-based compensation Share-based Compensation Repurchases of forward loan assets out of Ginnie Mae securitizations Repurchase of Forward Loan Assets out of Ginnie Mae Securitizations Repurchase of Forward Loan Assets out of Ginnie Mae Securitizations Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to prior servicers Repurchase Of Reverse Loan Assets Out Of Asset Securitizations Repurchase Of Reverse Loan Assets Out Of Asset Securitizations Mortgage loans originated and purchased, net of fees Payments for Origination and Purchases of Loans Held-for-sale Sale proceeds and loan payment proceeds for mortgage loans held for sale and held for investment Proceeds From Sale And Other Changes In Mortgage Loan Held For Sale Proceeds from sale and other changes in mortgage loan held for sale. Excess tax benefit (deficiency) from share based compensation Excess Tax Benefit (Deficiency) from Share-based Compensation, Operating Activities Excess Tax Benefit (Deficiency) from Share-based Compensation, Operating Activities Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Advances and other receivables, net Increase (Decrease) in Accounts Receivable Reverse mortgage interests, net Increase Decrease in Reverse Funded Advances Due to Securitization Reverse funded advances due to securitization Other assets Increase (Decrease) in Other Operating Assets Payables and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash attributable to operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Property and equipment additions, net of disposals Payments for (Proceeds from) Productive Assets Purchase of forward mortgage servicing rights, net of liabilities incurred Payments to Acquire Mortgage Servicing Rights (MSR) Purchase of reverse mortgage interests, net Payments for Reverse Mortgage Interests, Net of Participations Sold Payments for Reverse Mortgage Interests, Net of Participations Sold Proceeds on sale of reverse mortgage servicing rights Proceeds from Sale of Other Assets, Investing Activities Net cash attributable to investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Transfers (to) from restricted cash, net Proceeds from (Repayments of) Restricted Cash, Financing Activities Debt financing costs Payments of Financing Costs Increase (decrease) in warehouse facilities Proceeds from (Repayments of) Secured Debt Increase (decrease) advance facilities Proceeds from (Repayments of) Lines of Credit Proceeds from HECM securitizations Proceeds from Other Debt Repayment of HECM securitizations Repayments of Other Debt Repayment of excess spread financing Repayment of Excess Servicing Spread Financing Repayment of excess servicing spread financing Increase (decrease) in participating interest financing in reverse mortgage interests Proceeds from (Payments for) Mortgage Backed Securities Notes Payable Proceeds from (Payments for) Mortgage Backed Securities Notes Payable Repayment of nonrecourse debt – legacy assets Repayment of Nonrecourse Debt Legacy Assets Repayment of nonrecourse debt - Legacy assets Repurchase of unsecured senior notes Payment for Repurchase of Unsecured Debt Payment for Repurchase of Unsecured Debt Repurchase of common stock Payments for Repurchase of Common Stock Excess tax (deficiency) benefit from share based compensation Excess Tax Benefit (Deficiency) from Share-based Compensation, Financing Activities Excess Tax Benefit (Deficiency) from Share-based Compensation, Financing Activities Surrender of shares relating to stock vesting Payments Related to Tax Withholding for Share-based Compensation Net cash attributable to financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Segment Reporting [Abstract] Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table] Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table] MSR Financing Liability MSR Financing Liability [Member] MSR Financing Liability Low High Weighted Average Weighted Average [Member] Weighted Average Assumption [Axis] Weighted Average Assumption [Axis] Weighted Average Assumption [Axis] Weighted Average Assumption [Domain] Weighted Average Assumption [Domain] [Domain] for Weighted Average Assumption [Axis] Financing rates Financing rates [Member] financing rates Recovery rates Recovery rates [Member] Recovery rates Assumption for Fair Value of Mortgage Servicing Rights Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] Discount rate percent Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Total prepayment speeds Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Expected weighted-average life Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Expected weighted-average life Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Expected weighted-average life Prepayment speeds percent Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed Average life Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Weighted Average Life Discount rate percent Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate Recapture Rate percent Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Recapture Rate Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Recapture Rate Advance financing rates Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Advanced Financing Rate Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Advanced Financing Rate Annual advance recovery rates Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Annual Advanced Recovery Rates Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Annual Advanced Recovery Rates Schedule of Servicing Assets at Amortized Value [Table] Schedule of Servicing Assets and Liabilities at Amortized Value [Table] Schedule of Servicing Assets and Liabilities at Amortized Value [Table] Servicing Assets at Amortized Value Servicing Assets and Liabilities at Amortized Value [Line Items] [Line Items] Servicing Assets and Liabilities at Amortized Value [Line Items] [Line Items] Servicing Asset at Amortized Value, Balance [Roll Forward] Servicing Asset at Amortized Cost, Balance [Roll Forward] Balance - beginning of period Servicing Asset at Amortized Cost Increased MSL obligation Servicing Asset at Amortized Cost, Additions Amortization/accretion Servicing Asset at Amortized Cost, Amortization Balance - end of the period Fair value - end of period Fair Value of Servicing Asset, Amortized Cost Fair Value of Servicing Asset, Amortized Cost Servicing Liability at Amortized Value [Roll Forward] Servicing Liability at Amortized Cost [Roll Forward] Balance - beginning of period Increased MSL obligation Servicing Liability at Amortized Cost, Additions Amortization/accretion Servicing Liability at Amortized Cost, Accretion Servicing Liability at Amortized Cost, Accretion Balance - end of the period Fair value - end of period Fair Value of Servicing Liability, Amortized Cost Fair Value of Servicing Liability, Amortized Cost Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Unsecured Senior Notes Senior Notes [Member] $600 face value, 6.500% interest rate payable semi-annually, due July 2021 Unsecured Senior Notes Six Point Five Percent Due July 2021 [Member] Unsecured Senior Notes 6.5% Due July 2021 $475 face value, 6.500% interest rate payable semi-annually, due August 2018 Unsecured Senior Notes Six Point Five Percent Due August 2018 [Member] Unsecured Senior Notes Six Point Five Percent Due August 2018 [Member] $400 face value, 7.875% interest rate payable semi-annually, due October 2020 Unsecured Senior Notes Seven Point Eight Seven Five Percent Due Oct 2020 [Member] Unsecured Senior Notes 7.875% Due Oct 2020 [Member] $375 face value, 9.625% interest rate payable semi-annually, due May 2019 Unsecured Senior Notes Nine Point Six Two Five Percent Due May 2019 [Member] Unsecured Senior Notes 9.625% Due May 2019 [Member] $300 face value, 6.500% interest rate payable semi-annually, due June 2022 Unsecured Senior Notes Six Point Five Percent Due July 2022 [Member] Unsecured Senior Notes Six Point Five Percent Due July 2022 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unsecured senior notes principal amount Unsecured Debt, Gross Unsecured Debt, Gross Debt issuance costs Debt Issuance Costs, Net Unsecured senior notes, net Debt issued Debt Instrument, Face Amount Interest Rate Debt Instrument, Interest Rate, Stated Percentage Income Taxes Income Tax Disclosure [Text Block] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Servicing Segment Servicing Segment [Member] Servicing Segment [Member] Originations Segment Originations Segment [Member] Originations Segment [Member] Notes Payable, Other Notes Payable, Other Payables [Member] Advance facilities Advance Facilities [Member] Advance Facilities [Member] Notes Payable to Banks Notes Payable to Banks [Member] Warehouse Facilities Warehouse Facilities [Member] Warehouse Facilities [Member] Nationstar agency advance receivables trust Nationstar Advance Agency Receivables Trust [Member] Nationstar Advance Agency Receivables Trust [Member] Nationstar mortgage advance receivable trust NSM Advance Receivable Trust (2013) [Member] NSM Advance Receivable Trust (2013) [Member] Nationstar agency advance financing facility Agency Advance Financing Facility (2011) [Member] Agency Advance Financing Facility (2011) [Member] MBS servicer advance facility (2014) MBS Servicer Advance Facility (2014) [Domain] MBS Servicer Advance Facility (2014) [Domain] MBS advance financing facility MBS Advance Financing Facility March 2018 [Member] MBS Advance Financing Facility March 2018 [Member] MBS advance financing facility (2012) MBS Advance Financing Facility 2012 [Member] MBS Advance Financing Facility 2012 [Member] $1,200 warehouse facility Warehouse Facility $1.3 Billion [Member] Warehouse Facility $1.3 Billion [Member] $900 warehouse facility $900 Warehouse Facility [Member] $900 Warehouse Facility [Member] $850 warehouse facility $850 Warehouse Facility [Member] $850 Warehouse Facility [Member] $500 warehouse facility Warehouse Facility $500 Million [Member] Warehouse Facility $500 Million [Member] $500 warehouse Facility $500 Warehouse Facility Due September 2017 [Member] $500 Warehouse Facility Due September 2017 [Member] $350 warehouse facility Warehouse Facility $350 Million [Member] Warehouse Facility $350 Million [Member] $350 warehouse facility Warehouse Facility $200 Million Due 2016 [Member] Warehouse Facility $200 Million Due 2016 [Member] $300 warehouse facility Warehouse Facility $300 Million Facility Due 2016 [Member] Warehouse Facility $300 Million Facility Due 2016 [Member] $200 warehouse facility Warehouse Facility $200 Million [Member] Warehouse Facility $200 Million [Member] $40 warehouse facility $40 million Warehouse Facility [Member] $40 million Warehouse Facility [Member] Mortgage loans, net Loans Held-for-sale, Mortgages [Member] Loans Held-for-sale, Mortgages [Member] Reverse mortgage interests, net MSR and other collateral Mortgage Servicing Rights and Other Collaterals [Member] Mortgage Servicing Rights and Other Collaterals [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt outstanding, gross Secured Debt, Gross Secured Debt, Gross Debt Outstanding Pledged collateral Debt Instrument, Collateral Amount Basis spread on rate Debt Instrument, Basis Spread on Variable Rate Loans subject to repurchase right from Ginnie Mae Resell Agreement, Loans and Leases Receivable Resell Agreement, Loans and Leases Receivable Accrued revenues Servicing Fees Receivable Servicing Fees Receivable Goodwill Goodwill Deposits Deposit Assets Intangible assets Intangible Assets, Net (Excluding Goodwill) Real estate owned (REO), net Real Estate Owned Net Real estate owned (REO), net Prepaid expenses Prepaid Expense Receivables from affiliates, net Due from Affiliates Other Other Assets, Miscellaneous Total other assets Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Eliminations Intersegment Eliminations [Member] Corporate and Other Corporate, Non-Segment [Member] Operating Segments Operating Segments [Member] Xome Xome Segment [Member] Xome Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net gain on mortgage loans held for sale Other income (expenses): Other Nonoperating Income (Expense) [Abstract] Other Depreciation and amortization Total assets Schedule of Servicing Assets at Fair Value [Table] Schedule of Servicing Assets at Fair Value [Table] Servicing Assets at Fair Value [Line Items] Servicing Assets at Fair Value [Line Items] Servicing Asset at Fair Value, Amount [Roll Forward] Servicing Asset at Fair Value, Amount [Roll Forward] Fair value - beginning of period Servicing retained from mortgage loans sold Servicing Asset at Fair Value, Additions, Servicing Retained From Mortgage Loans Sold Servicing Asset at Fair Value, Additions, Servicing Retained From Mortgage Loans Sold Purchases of servicing rights Servicing Asset at Fair Value, Additions Sales of servicing assets Servicing Asset at Fair Value, Disposals Changes in valuation inputs or assumptions used in the valuation model Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions Other changes in fair value Servicing Asset at Fair Value, Other Changes in Fair Value Fair value - end of period Secured Debt Secured Debt [Member] Nonrecourse debt–legacy assets Nonrecourse Debt [Member] Nonrecourse Debt Legacy Assets [Member] HECM Securitizations HECM Securitizations [Member] HECM Securitizations [Member] Securities Pledged as Collateral Securities Pledged as Collateral [Member] Maximum percentage redeemable on unsecured debt Maximum Percentage Redeemable of Aggregate Principal on Unsecured Debt Maximum percentage redeemable of aggregate principal on unsecured debt with the net proceeds of certain equity offerings at a fixed redemption prices, plus accrued and unpaid interest and additional interest, if any, to the redemption dates, subject to compliance with certain conditions. Interest rate Weighted average useful life Debt Instrument, Call Date, Weighted Average Term Debt Instrument, Call Date, Weighted Average Term Principal amount outstanding on securitized financing Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement Debt Instrument, Principal Amount Outstanding Debt Instrument, Principal Amount Outstanding Debt Instrument, Principal Amount Outstanding Non-recourse debt Minimum tangible net worth Minimum Tangible Net Worth Required for Compliance Minimum Tangible Net Worth Required for Compliance Unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Mortgage Servicing Rights [Table] Mortgage Servicing Rights [Table] Mortgage Servicing Rights [Table] Mortgage Servicing Rights [Line Items] Mortgage Servicing Rights [Line Items] Mortgage Servicing Rights [Line Items] Reverse MSRs - amortized cost Mortgage servicing rights Mortgage servicing liabilities - amortized cost Excess spread financing - fair value MSR related liabilities (nonrecourse) Reverse Mortgage Interest [Abstract] Reverse Mortgage Interest [Abstract] Repurchased HECM loans Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Repurchase of Home Equity Conversion Mortgages Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Repurchase of Home Equity Conversion Mortgages HECM related receivables Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Home Equity Conversion Mortgage Receivables Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Home Equity Conversion Mortgage Receivables Funded borrower draws not yet securitized Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Funded Draws Not Yet Securitized Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Funded Draws Not Yet Securitized Foreclosed assets Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Foreclosed Assets Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Foreclosed Assets Unsecuritized interests Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized Participating interests in HMBS Reverse Mortgage Interest Subject to Non-Recourse Debt Reverse Mortgage Interest Subject to Non-Recourse Debt Other interests securitized Reverse Mortgage Interest, Unpaid Principal Balance, Other Interests Securitized Reverse Mortgage Interest, Unpaid Principal Balance, Other Interests Securitized Unsecuritized interests Reserves Reverse mortgage interests, net Mortgage Servicing Rights (MSRs) and Related Liabilities Transfers and Servicing of Financial Assets [Text Block] Payables and Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Assets Derivative Financial Instruments, Assets [Member] Derivative Liabilities Derivative Financial Instruments, Liabilities [Member] Loan sale commitments Loan Sale Commitment [Member] Loan Sale Commitment [Member] Interest rate swaps Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Outstanding Notional - Asset Derivative Asset, Notional Amount Outstanding Notional - Liability Derivative Liability, Notional Amount Recorded Gains / (Losses) Derivative, Gain (Loss) on Derivative, Net Mortgage Loans Held for Sale and Investment Financing Receivables [Text Block] Loans Subject to Repurchase Reserve [Roll Forward] Loans Subject to Repurchase Reserve [Roll Forward] Loans Subject to Repurchase Reserve [Roll Forward] Balance - beginning of period Provision, net of release Repurchase Reserve, Additions Repurchase Reserve, Additions Charge-offs Repurchase Reserve, Charge-offs Repurchase Reserve, Charge-offs Balance - end of period Schedule of Mortgage Loans Held-for-Sale Schedule of Loans Held-for-Sale [Table Text Block] Schedule of Loans Held-for-Sale [Table Text Block] Reconciliation of Mortgage Loans Held-for-Sale to Cash Flow Reconciliation of Mortgage Loans Held-for-Sale to Cash Flow [Table Text Block] Reconciliation of Mortgage Loans Held-for-Sale to Cash Flow [Table Text Block] Schedule of Loans Held for Investment Schedule of Loans Held for Investment [Table Text Block] Schedule of Loans Held for Investment [Table Text Block] Changes in Accretable Yield on Mortgage Loans Held for Investment Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield [Table Text Block] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield [Table Text Block] Statement of Cash Flows [Abstract] Net income (loss) attributable to Nationstar Reconciliation of net income (loss) to net cash attributable to operating activities: Net gain on mortgage loans held for sale Amortization of premiums and accretion of discount Share-based compensation Other loss Mortgage loans originated and purchased, net of fees Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment Excess tax benefit from share-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Advances and other receivables, net Reverse mortgage interests, net Payables and accrued liabilities Property and equipment additions, net of disposals Purchase of forward mortgage servicing rights, net of liabilities incurred Proceeds on sale of forward and reverse mortgage servicing rights Proceeds from Sale of Mortgage Servicing Rights (MSR) Decrease in advance facilities Decrease in participating interest financing in reverse mortgage interests Transfers to restricted cash, net Excess tax deficiency from share based compensation Debt financing costs Supplemental disclosures of cash activities Supplemental Cash Flow Elements [Abstract] Cash paid for interest expense Interest Paid Net cash paid for income taxes Income Taxes Paid, Net Statutory federal rate percentage Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Treasury Share Amount Treasury Stock [Member] Total Nationstar Stockholders' Equity Parent [Member] Non-controlling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning of Period, shares Shares, Outstanding Beginning of Period Shares issued (surrendered) under incentive plan, net, shares Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Shares issued (surrendered) under incentive plan, net Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Excess tax benefit from share based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Repurchase of common stock, shares Repurchase of common stock Stock Repurchased During Period, Value Net income (loss) Ending of Period Ending of Period, shares Income tax expense (benefit) Effective tax rate Effective Income Tax Rate Reconciliation, Percent 2017 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four 2021 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Unsecured senior notes principal amount Unamortized debt issuance costs Other Assets Other Assets Disclosure [Text Block] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Advances and Other Receivables Reserves Advances and Other Receivables Reserves [Member] Advances and Other Receivables Reserves [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Balance - beginning of period Valuation Allowances and Reserves, Balance Provision and other additions Valuation Allowances and Reserves, Additions Valuation Allowances and Reserves, Additions Write-offs Valuation Allowances and Reserves, Deductions Balance - end of period Receivables From Prior Servicers, Reverse Mortgage Interests [Member] Receivables From Prior Servicers, Reverse Mortgage Interests [Member] Receivables From Prior Servicers, Reverse Mortgage Interests [Member] Participating Interests in HMBS Participating Interests in HMBS [Member] Participating Interests in HMBS [Member] Reverse Mortgage Interests, Unsecuritized Reverse Mortgage Interests, Unsecuritized [Member] Reverse Mortgage Interests, Unsecuritized [Member] HECM Loan Portfolio HECM Loan Portfolio [Member] HECM Loan Portfolio [Member] HECM HECM [Member] HECM [Member] Unsecuritized HECM Unsecuritized HECM [Member] Unsecuritized HECM [Member] UPB securitized Reverse Mortgage Interest, Unpaid Principal Balance, Securitized Reverse Mortgage Interest, Unpaid Principal Balance, Securitized Repurchase of HECM loans Reverse Mortgage Interest, Unsecuritized, Repurchase of Home Equity Conversion Mortgages Reverse Mortgage Interest, Unsecuritized, Repurchase of Home Equity Conversion Mortgages Repurchase of HECM loans funded by prior servicer Reverse Mortgage Interest, Unsecuritized, Repurchase of Home Equity Conversion Mortgages Funded by Prior Servicer Reverse Mortgage Interest, Unsecuritized, Repurchase of Home Equity Conversion Mortgages Funded by Prior Servicer Reverse mortgage interests Reverse Mortgage Interests Reverse Mortgage Interests Interest earned on HECM loans Interest and Fee Income, Loans Held-for-sale, Mortgages Ownership percentage Guarantor Subsidiary, Ownership Percentage Guarantor Subsidiary, Ownership Percentage Number of subsidiaries as guarantors of unsecured debt Number of Subsidiaries as Guarantors of Unsecured Debt Number of Subsidiaries as Guarantors of Unsecured Debt Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Current Reporting Status Entity Current Reporting Status Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Consolidating Balance Sheets Condensed Balance Sheet [Table Text Block] Consolidating Statements of Operations Condensed Income Statement [Table Text Block] Consolidating Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Schedule of Servicing Assets at Fair Value Schedule of Servicing Assets at Fair Value [Table Text Block] Schedule of Assumptions for Fair Value of Mortgage Service Rights Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Activity of MSRs at Amortized Cost Schedule of Servicing Assets and Liabilities at Amortized Cost [Table Text Block] Schedule of Servicing Assets and Liabilities at Amortized Cost [Table Text Block] Schedule of Fees Earned in Exchange for Servicing Financial Assets Schedule of Fees Earned in Exchange for Servicing Financial Assets [Table Text Block] Schedule of Fees Earned in Exchange for Servicing Financial Assets [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Servicing Asset at Amortized Cost [Table] Servicing Asset at Amortized Cost [Table] Forward MSRs Sold Forward MSRs Sold [Member] Forward MSRs Sold [Member] Reverse Mortgage Servicing Rights Reverse Mortgage Servicing Rights [Member] Reverse Mortgage Servicing Rights [Member] Servicing Asset at Amortized Cost [Line Items] Servicing Asset at Amortized Cost [Line Items] Impairment Impairment of Intangible Assets, Finite-lived Servicing fee income accretion expense Servicing Fee Income, Accretion Expense Servicing Fee Income, Accretion Expense Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Subsidiary of New Residential Subsidiary of New Residential [Member] Subsidiary of New Residential [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Loan Subservicing Agreement Loan Subservicing Agreement [Member] Loan Subservicing Agreement [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Newcastle Newcastle [Member] Newcastle [Member] New Residential New Residential [Member] New Residential NIC Reverse Loan LLC NIC Reverse Loan LLC [Member] NIC Reverse Loan LLC [Member] OneMain Financial Holdings, LLC OneMain Financial Holdings, LLC [Member] OneMain Financial Holdings, LLC [Member] Agency MSRs Agency MSRs [Member] Agency MSRs [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Servicing fees and other performance incentive fees received Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets Servicing fee, percentage of unpaid principal balance Mortgage Servicing Fee, Percentage of Unpaid Principal Balance Mortgage Servicing Fee, Percentage of Unpaid Principal Balance Fees paid Payments for Servicing Fees Payments for Servicing Fees Nonrecourse variable funding notes Nonrecourse Variable Funding Notes issued by Special Purpose Subsidiaries of NSM Nonrecourse Variable Funding Notes issued by Special Purpose Subsidiaries of NSM Number of wholly owned special purpose entities Number of Wholly Owned Special Purpose Entities Number of Wholly Owned Special Purpose Entities Forward Mortgage Loans Subserviced, Unpaid Principal Balance Forward Mortgage Loans Subserviced, Unpaid Principal Balance Forward Mortgage Loans Subserviced, Unpaid Principal Balance Revenue recognized from servicing agreements Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets, Revenue Recognized Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets, Revenue Recognized Related party transaction amount Related Party Transaction, Amounts of Transaction Recognized revenue from related party Revenue from Related Parties Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Indebtedness Debt Disclosure [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Contractually specified servicing fees including subservicing fees Contractually Specified Servicing Fees, Amount Other service-related income Other Service Related Income Other Service Related Income Incentive and modification income Servicing Fee Income, Incentive and Modification Income Servicing Fee Income, Incentive and Modification Income Late fees Late Fee Income Generated by Servicing Financial Assets, Amount Reverse servicing fees Reverse Servicing Fees, Amount Reverse Servicing Fees, Amount Mark-to-market Servicing Fee Income, Mark to Market Adjustment Servicing Fee Income, Mark to Market Adjustment Counter party revenue share Servicing Fee Income, Counter Party Revenue Share Servicing Fee Income, Counter Party Revenue Share Amortization, net of accretion Servicing Fee Income, Amortization Servicing Fee Income, Amortization Total servicing revenue Servicing Fee Income, Net Servicing Fee Income, Net Schedule of Assets and Liabilities of VIEs Included in Financial Statements Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table Text Block] Eliminations Salaries, wages and benefits General and administrative Gain (loss) from subsidiaries Income (Loss) from Subsidiaries, before Tax Less: Income tax expense Less: Net loss attributable to noncontrolling interests Schedule of Other Assets Schedule of Other Assets [Table Text Block] Other Other [Member] Other [Member] Securitized Amount Servicing Fees Received Cash Flows Between Transferor and Transferee, Servicing Fees Loan Repurchases Cash Flows Between Transferor and Transferee, Purchases of Previously Transferred Financial Assets Reverse Mortgage Interests, Net Reverse Mortgage Interest Disclosure [Text Block] Reverse Mortgage Interest Disclosure [Text Block] Business Segment Reporting Segment Reporting Disclosure [Text Block] Reverse funded loan advances [Table] Ginnie Mae Loans Ginnie Mae HECM [Member] Ginnie Mae HECM [Member] Servicing Assets at Fair Value [Line Items] Servicing Assets [Line Items] Servicing Assets [Line Items] Delinquent loans acquired Mortgage Loans Held for Sale, Delinquent Loans Acquired Mortgage Loans Held for Sale, Delinquent Loans Acquired Delinquent loans securitized or sold Mortgage Loans Held for Sale, Delinquent Loans Securitized or Sold Mortgage Loans Held for Sale, Delinquent Loans Securitized or Sold Purchased loans that have re-performed Mortgage Loans Held for Sale, Purchased Loans that have Re-performed Mortgage Loans Held for Sale, Purchased Loans that have Re-performed Mortgage loans held for sale in foreclosure Mortgage Loans in Process of Foreclosure, Amount Sale of mortgage loans held for sale Proceeds from Sale of Mortgage Loans Held-for-sale Gain on sale of mortgage loans held for sale Gain on Sale of Mortgage Loans Gain on Sale of Mortgage Loans Provision for reserves Allowance for Loan Losses of Mortgage Loans Held for Investment Allowance for Loan Losses of Mortgage Loans Held for Investment Mortgage loans held for investment in foreclosure Mortgage Loans Held for Investment in foreclosure, amount mortgage loans held for investment in foreclosure, amount Advances and other receivables, Reserves Reverse mortgage interests, Reserves Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury Shares Treasury Stock, Shares Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table] Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table] Residential Mortgage Residential Mortgage [Member] Trust 2015-2 Trust 2016-1 Trust 2016-2 Trust 2016-3 Other nonrecourse debt Restricted cash Restricted Cash [Member] Restricted Cash [Member] Advances and other receivables, net Accounts Receivable [Member] Other assets Other Assets [Member] Advance facilities Notes Payable [Member] Notes Payable [Member] Payables and accrued liabilities Accounts Payable and Accrued Liabilities [Member] Participating interest financing Other Non-Recourse Debt Other Non-Recourse Debt [Member] Other Non-Recourse Debt Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] Assets Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount Reverse Secured Borrowings, Assets, Carrying Amount Reverse Secured Borrowings, Assets, Carrying Amount Reverse Secured Borrowings, Assets, Carrying Amount Liabilities Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount Reverse Secured Borrowings, Liabilities, Carrying Amount Reverse Secured Borrowings, Liabilities, Carrying Amount Reverse Secured Borrowings, Liabilities, Carrying Amount Transactions with Affiliates Related Party Transactions Disclosure [Text Block] Nature of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Mortgage loans held for investment, net – UPB Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Non-accretable Certain Loans Acquired in Transfer, Nonaccretable Difference Accretable Total mortgage loans held for investment, net Collateral deposit assets (liabilities) Margin Deposit Assets (Liabilities) Margin Deposit Assets (Liabilities)