Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Financial Information [Table Text Block] Schedule of Quarterly Financial Information [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Cumulative Distributions Accumulated Distributions in Excess of Net Income [Member] Non-Controlling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Distributions Declared, Per Share Common Stock, Dividends, Per Share, Declared Accounting Policies [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Investment Type [Axis] Investment Type [Axis] Investment [Domain] Investments [Domain] Equity Method Investments [Member] Equity Method Investments [Member] Real Estate Properties [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Trenton Properties [Member] Trenton Properties [Member] Trenton Properties [Member] Notes Receivable by Maturity [Axis] Notes Receivable by Maturity [Axis] Notes Receivable by Maturity [Axis] Notes Receivable by Maturity [Domain] Notes Receivable by Maturity [Domain] Notes Receivable by Maturity [Domain] 20 Year Amortization Period [Member] Twenty Year Amortization Period [Member] Twenty Year Amortization Period [Member] Notes Receivable Due Two Thousand Sixteen [Member] Notes Receivable Due Two Thousand Sixteen [Member] Notes Receivable Due Two Thousand Sixteen [Member] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Accrued Rent Receivable [Member] Accrued Rent Receivable [Member] Accrued Rent Receivable [Member] River Place [Member] River Place [Member] River Place [Member] Purchase money mortgage [Member] Purchase money mortgage [Member] Purchase money mortgage [Member] Accrued interest received [Member] Accrued interest received [Member] Accrued interest received [Member] Accounts receivable and accrued rent receivable [Member] Accounts receivable and accrued rent receivable [Member] Accounts receivable and accrued rent receivable [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Concentration Risk, Percentage Concentration Risk, Percentage Short-term Debt, Terms Short-term Debt, Terms Capitalized interest Interest Costs Capitalized Interest Income Interest Income, Other Allowance for Doubtful Accounts Receivable Allowance for Doubtful Accounts Receivable Notes receivable Financing Receivable, Net Mortgage Loans on Real Estate, Interest Rate Mortgage Loans on Real Estate, Interest Rate Notes Receivable Amortization Period, Years Notes Receivable Amortization Period, Years Notes Receivable Amortization Period, Years Number of properties sold Number of properties sold Number of properties sold. Gross deferred gain on sale of properties Deferred Gain on Sale of Property Disclosure of Compensation Related Costs, Share-based Payments [Abstract] SHARE BASED AND DEFERRED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract] Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] 3141 Fairview Park Drive [Member] 3141 Fairview Park Drive [Member] 3141 Fairview Park Drive [Member] Real Estate and Accumulated Depreciation [Line Items] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] Tax Basis of Assets, Cost for Income Tax Purposes SEC Schedule III, Real Estate, Federal Income Tax Basis Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Statement of Cash Flows [Abstract] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] BRANDYWINE OPERATING PARTNERSHIP, L.P. Subsidiaries [Member] Supplemental disclosure: Supplemental Cash Flow Information [Abstract] Capitalized interest Interest Paid, Capitalized Income Tax Contingency [Table] Income Tax Contingency [Table] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Increase In Revenue Due To Amortization Of Deferred Rent Increase In Revenue Due To Amortization Of Deferred Rent Increase in revenue due to amortization of deferred rent. Distributable Income Minimum Percentage Distributable Income Minimum Percentage Distributable income minimum percentage. Federal excise tax if sufficient taxable income is not distributed within prescribed time limits Federal excise tax if sufficient taxable income is not distributed within prescribed time limits Federal excise tax if sufficient taxable income is not distributed within prescribed time limits Excise tax equal to annual amount Excise tax equal to annual amount Excise tax equal to annual amount Excise tax, if sum of ordinary income Excise tax, if sum of ordinary income Excise tax, sum of ordinary income Excise tax, if Net capital gain exceeds cash distributions and certain taxes paid Excise tax, if Net capital gain exceeds cash distributions and certain taxes paid Excise tax, if Net capital gain exceeds cash distributions and certain taxes paid Commitments and Contingencies Disclosure [Abstract] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Contractual Obligation [Axis] Contractual Obligation [Axis] Contractual Obligation [Axis] Contractual Obligation [Domain] Contractual Obligation [Domain] Contractual Obligation [Domain] Ground Rent [Member] Ground Rent [Member] Ground Rent [Member] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Minimum future rental payments on non-cancelable leases Operating Leases, Future Minimum Payments Receivable [Abstract] Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Company's restricted share activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block] Equity [Abstract] BENEFICIARIES' EQUITY OF THE PARENT COMPANY Beneficiaries Equity [Text Block] Beneficiaries' Equity. Derivative Instruments and Hedging Activities Disclosure [Abstract] RISK MANAGEMENT AND USE OF FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Schedule of Accumulated other comprehensive income (loss) [Table] Schedule of Accumulated other comprehensive income (loss) [Table] Schedule of Accumulated other comprehensive income (loss) [Table] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Schedule of Accumulated other comprehensive income (loss) [Line Items] Schedule of Accumulated other comprehensive income (loss) [Line Items] Schedule of Accumulated other comprehensive income (loss) [Line Items] Balance at January 1, Accumulated Other Comprehensive Income (Loss), Net of Tax Change during year Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Non-controlling interest- consolidated real estate venture partner's share of unrealized (gains)/losses on derivative financial instruments Other Comprehensive Income (Loss) Non-Controlling Interest Consolidated Real Estate Venture Partner's Share of Unrealized (gains) losses on derivative financial statements Other Comprehensive Income (Loss) Non-Controlling Interest Consolidated Real Estate Venture Partner's Share of Unrealized (gains) losses on derivative financial statements Loss on settlement of interest rate swaps Derivative, Gain (Loss) on Derivative, Net Reclassification of realized (gains)/losses on derivative financial instruments to operations, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Balance at December 31, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Other Liabilities [Member] Other Liabilities [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Note Five [Member] Note Five [Member] $250.0M 7.500% Guaranteed Notes due 2015. Three Year Term Loan [Member] Three Year Term Loan [Member] Three Year Term Loan [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Unsecured Debt [Member] Unsecured Debt [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] 3.623% Interest Rate Swap Maturing February 1, 2019 [Member] 3.623% Interest Rate Swap Maturing February 1, 2019 [Member] 3.623% Interest Rate Swap Maturing February 1, 2019 [Member] 2.703% Interest Rate Swap Maturing February 1, 2016 [Member] 2.703% Interest Rate Swap Maturing February 1, 2016 [Member] 2.702% Interest Rate Swap Maturing February 1, 2016 [Member] 2.470% Interest Rate Swap Maturing February 1, 2015 [Member] 2.470% Interest Rate Swap Maturing February 1, 2015 [Member] 2.470% Interest Rate Swap Maturing February 1, 2015 [Member] 2.513% Interest Rate Swap Maturing May 1, 2015 [Member] 2.513% Interest Rate Swap Maturing May 1, 2015 [Member] 2.513% Interest Rate Swap Maturing May 1, 2015 [Member] 2.750% Interest Rate Swap Maturing September 30, 2017 [Member] 2.750% Interest Rate Swap Maturing September 30, 2017 [Member] 2.750% Interest Rate Swap Maturing September 30, 2017 [Member] 3.300% Interest Rate Swap Maturing January 30, 2021 [Member] 3.300% Interest Rate Swap Maturing January 30, 2021 [Member] 3.300% Interest Rate Swap Maturing January 30, 2021 [Member] 3.090% Interest Rate Swap Maturing October 30, 2019 [Member] 3.090% Interest Rate Swap Maturing October 30, 2019 [Member] 3.090% Interest Rate Swap Maturing October 30, 2019 [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Debt Instrument, Repurchased Face Amount Debt Instrument, Repurchased Face Amount Notional Amount Derivative, Notional Amount Derivative, Fixed Interest Rate Derivative, Fixed Interest Rate Derivative Asset, Notional Amount Derivative Asset, Notional Amount Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement Derivative Liability, Notional Amount Derivative Liability, Notional Amount Long Term Debt Maturities Repayments Of Principal Long Term Debt Maturities Repayments Of Principal Long term-debt maturities repayments of principal Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subsidiaries [Member] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Senior Notes Due2012 [Member] Senior Notes Due2012 [Member] Senior Notes Due2012. Senior notes 5.400 Percent due 2014 [Member] Senior notes 5.400 Percent due 2014 [Member] Senior notes 5.400 Percent due 2014 [Member] Senior Notes Due2015 [Member] Senior Notes Due2015 [Member] Senior Notes Due2015. Interest Rate Type [Axis] Interest Rate Type [Axis] Interest Rate Type [Axis] Interest Rate Type [Domain] Interest Rate Type [Domain] Interest Rate Type [Domain] Federal Funds Rate [Member] Federal Funds Rate [Member] Federal Funds Rate [Member] Letter of Credit [Member] Letter of Credit [Member] New Revolving Credit Facility [Member] Line of Credit [Member] Bank Term Loan and the Credit Facility [Member] Bank Term Loan And The Credit Facility [Member] Bank Term Loan and the Credit Facility Member. Note 2023 [Member] Note 2023 [Member] $250.0M 3.950% Guaranteed Notes due 2023 $300.0M 5.750% Guaranteed Notes due 2012 [Member] Note Three [Member] $300.0M 5.750% Guaranteed Notes due 2012. $250.0M 5.400% Guaranteed Notes due 2014 [Member] Note Four [Member] $250.0M 5.400% Guaranteed Notes due 2014. $250.0M 7.500% Guaranteed Notes due 2015 [Member] $250.0M 6.000% Guaranteed Notes due 2016 [Member] Note Six [Member] $250.0M 6.000% Guaranteed Notes due 2016. $300.0M 5.700% Guaranteed Notes due 2017 [Member] Note Seven [Member] $300.0M 5.700% Guaranteed Notes due 2017. $325.0M 4.950% Guaranteed Notes due 2018 [Member] Note Eight [Member] Note Eight Member. Seven Year Term Loan [Member] Seven Year Term Loan [Member] Seven Year Term Loan [Member] Note 2024 [Member] Note 2024 [Member] Note 2024 [Member] Note 2029 [Member] Note 2029 [Member] Note 2029 [Member] Unsecured Debt [Member] Secured Debt [Member] Secured Debt [Member] Participating Mortgage Loans [Line Items] Participating Mortgage Loans [Line Items] Debt Instrument, Redemption, Description Debt Instrument, Redemption, Description Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Properties encumbered mortgage indebtedness carrying value, net Properties encumbered mortgage indebtedness carrying value, net Properties encumbered mortgage indebtedness carrying value, net Debt obligations (Textuals) Debt Obligations (Textuals) [Abstract] Debt Obligations Textuals Abstract. Debt instrument, face amount Debt Instrument, Face Amount Letters of credit outstanding Letters of Credit Outstanding, Amount Unused availability under the Credit Facility Line of Credit Facility, Remaining Borrowing Capacity Early Repayment of Senior Debt Early Repayment of Senior Debt Derivative, Average Fixed Interest Rate Derivative, Average Fixed Interest Rate Amortization of Financing Costs Amortization of Financing Costs Long-term Debt, Gross Long-term Debt, Gross Loss on early extinguishment of debt Gains (Losses) on Extinguishment of Debt PARTNERS' EQUITY OF THE OPERATING PARTNERSHIP Partners Equity of Operating Partnership [Text Block] Partners Equity of Operating Partnership. Real Estate and Accumulated Depreciation Disclosure [Text Block] SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] Segment Reporting [Abstract] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Summary of debt repurchases Long-term Debt, Fiscal Year Maturity [Abstract] 2015 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2016 Long-term Debt, Maturities, Repayments of Principal in Year Two 2017 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Four 2019 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total principal payments Net unamortized premiums/(discounts) Debt Instrument, Unamortized Discount (Premium), Net Total Debt Obligations Long-term Debt Discontinued Operations and Disposal Groups [Abstract] Revenue and expenses information for the property classified as discontinued operations Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Variable rate and mortgage debt [Member] Variable rate and mortgage debt [Member] Variable rate and mortgage debt [Member] 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 Inputs, Discount Rate Fair Value Inputs, Discount Rate Fair Value of Financial Instruments (Textuals) [Abstract] Fair Value Of Financial Instruments (Textuals) [Abstract] Fair Value of Financial Instruments. Number of properties sold (in properties) Distributions [Abstract] Distributions [Abstract] Common Share Distributions Payments of Ordinary Dividends Common Share Distributions Payments of Ordinary Dividends Common Share Distributions Payments of Ordinary Dividends Common Share Distributions Capital Gain Common Share Distributions Capital Gain Common Share Distributions Capital Gain Common Share Distributions Non-taxable Distributions Common Share Distributions Non-taxable Distributions Common Share Distributions Non-taxable Distributions Common Stock, Dividends, Per Share, Declared Percentage Of Distributions classified as ordinary income Percentage Of Distributions classified as ordinary income Percentage Of Distributions classified as ordinary income Percentage Of Distributions classified as capital gain Percentage Of Distributions classified as capital gain Percentage Of Distributions classified as capital gain Percentage Of Distributions classified as non-taxable distribution Percentage Of Distributions classified as non-taxable distribution Percentage Of Distributions classified as non-taxable distribution Dividends, Preferred Stock Dividends, Preferred Stock Percentage Of Preferred Distributions classified as ordinary income Percentage Of Preferred Distributions classified as ordinary income Percentage Of Preferred Distributions classified as ordinary income Investment in Unconsolidated Ventures (Textuals) [Abstract] Investment in Unconsolidated Ventures. Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] Four Points Centre [Member] Four Points Centre [Member] 11305 Four Points Drive [Member] - in Austin, TX. Known as "Four Points Centre" Joint Venture Members [Axis] Joint Venture Members [Axis] Joint Venture Members [Axis] Joint Venture Members [Domain] Joint Venture Members [Domain] [Domain] for Joint Venture Members [Axis] Third Parties and Real Estate Ventures [Member] Third Parties and Real Estate Ventures [Member] Third Parties and Real Estate Ventures. LCOR/Calstrs [Member] LCOR/Calstrs [Member] LCOR/Calstrs [Member] Ashton Park [Member] Ashton Park [Member] Ashton Park [Member] Brandywine Realty Trust [Member] Brandywine Realty Trust [Member] Brandywine Realty Trust [Member] DRA Advisors LLC [Member] DRA Advisors LLC [Member] DRA Advisors LLC [Member] Austin Joint Venture [Member] Austin Joint Venture [Member] Austin JV with DRA [Member] Campus Crest Properties, LLC [Member] Campus Crest Properties, LLC [Member] Campus Crest Properties, LLC [Member] HSRE, LLC [Member] [Member] HSRE, LLC [Member] [Member] HSRE, LLC [Member] [Member] TB-BDN Plymouth Apartments [Member] TB-BDN Plymouth Apartments [Member] TB-BDN Plymouth Apartments [Member] PJP VII [Member] PJP VII [Member] PJP VII. The Grove at Cira Centre South [Member] The Grove at Cira Centre South [Member] The Grove at Cira Centre South [Member] Equity Method Investee, Name [Axis] Investment, Name [Axis] Equity Method Investee, Name [Domain] Investment, Name [Domain] Brandywine Nineteen Nineteen Ventures [Member] Brandywine Nineteen Nineteen Ventures [Member] Brandywine Nineteen Nineteen Ventures [Member] Austin, Texas [Member] Austin, Texas [Member] Austin, Texas. BDN Beacon Venture LLC [Member] BDN Beacon Venture LLC [Member] BDN Beacon Venture LLC Two Tower Bridge [Member] Two Tower Bridge [Member] Two Tower Bridge [Member] 4040 Wilson Venture [Member] 4040 Wilson Venture [Member] 4040 Wilson Venture [Member] Six Tower Bridge [Member] Six Tower Bridge [Member] Six Tower Bridge [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity method investment, Consideration transferred Equity method investment, Consideration transferred equity method investment, consideration transferred Short-term Bank Loans and Notes Payable Short-term Bank Loans and Notes Payable Number of properties contributed to a joint venture Number of properties contributed to a joint venture Number of properties contributed to a joint venture Area of Real Estate Property Area of Real Estate Property Aggregate gross sales price of a joint venture Aggregate gross sales price of a joint venture Aggregate gross sales price of a joint venture General Partners' Contributed Capital General Partners' Contributed Capital Equity method investment, agreement to pay future capital expenditures Equity method investment, agreement to pay future capital expenditures Equity method investment, agreement to pay future capital expenditures Equity Method Investment, Distribution, Net of Initial Funding Agreement Equity Method Investment, Distribution, Net of Initial Funding Agreement Equity Method Investment, Distribution, Net of funding agreement for post-closing capital expenditures Number of Real Estate Properties Number of Real Estate Properties Number of apartment units in a Real Estate Venture Number of apartment units in a Real Estate Venture Number of apartment units in a Real Estate Venture. Potential future capital contributions under joint ventures which are not contractually binding Potential future capital contributions under joint ventures which are not contractually binding Potential future capital contributions under joint ventures which are not contractually binding Equity method investments, Cash contributions Equity method investments, Cash contributions Equity method investments, Cash contributions Net gain (loss) on real estate venture transactions Net Gain (Loss) On Real Estate Venture Transactions Net Gain (Loss) On Real Estate Venture Transactions Amount Of Participant Contribution Amount Of Participant Contribution Amount of participant contribution. Equity method investments, Closing costs Equity method investments, Closing costs Equity method investments, closing costs Closing Prorations and Lender Holdbacks Closing Prorations and Lender Holdbacks Closing prorations and lender holdbacks Proceeds from Equity Method Investment, Dividends or Distributions Proceeds from Equity Method Investment, Dividends or Distributions Number of floors of a building Number of floors of a building Number of floors of a building Student housing bed capacity Student housing bed capacity Student housing bed capacity Net proceeds from the contribution of land to an unconsolidated real estate venture Net proceeds from the contribution of land to an unconsolidated real estate venture Net proceeds from the contribution of land to an unconsolidated real estate venture Equity Method Investment, Additional Distribution Rights Equity Method Investment, Additional Distribution Rights Equity Method Investment, Additional Distribution Rights Non-Recourse Debt Non-Recourse Debt Equity Method Investment, Budgeted Total Project Cost Equity Method Investment, Budgeted Total Project Cost Equity Method Investment, Budgeted Total Project Cost Payments to Acquire Equity Method Investments Payments to Acquire Equity Method Investments Payments to Acquire Interest in Joint Venture Payments to Acquire Interest in Joint Venture Guaranty Percentage Guaranty Percentage Guaranty Percentage Construction Loan Development Costs - Contemplated Debt Financing Development Costs - Contemplated Debt Financing Guaranty Liabilities Guaranty Liabilities Equity Method Investment, Aggregate Cost Equity Method Investment, Aggregate Cost Debt Instrument, Number of Fixed Rate Mortgages Debt Instrument, Number of Fixed Rate Mortgages Debt Instrument, Number of Fixed Rate Mortgages Company's share of equity (Company's basis) Equity Method Investments Net gain on real estate venture transactions Nonmonetary Transaction, Gain (Loss) Recognized on Transfer Number of unconsolidated Real Estate Ventures Number of unconsolidated investments in Real Estate Ventures Number of unconsolidated investments in Real Estate Ventures. Equity Method Investments including net liabilities Equity Method Investments including net liabilities Equity Method Investments including net liabilities Number of real estate ventures that owns 51 office buildings Number of real estate ventures that owns buildings Number of real estate ventures that owns buildings. Number of office buildings owned by 15 Real Estate Ventures Number of office buildings in Real Estate Ventures Number of office buildings in Real Estate Ventures. Net rentable square feet of 51 office buildings owned the 15 Real Estate Ventures Aggregate Approximate Area Of Office Buildings Aggregate approximate area of office buildings. Number of real estate ventures that owns undeveloped land Number of real estate ventures that owns undeveloped land Number of real estate ventures that owns undeveloped land Area of undeveloped parcels of land (in acres) owned by a Real Estate Venture Area Owned By Real Estate Venture Of Undeveloped Parcels Of Land Area owned by Real estate venture of undeveloped parcels of land (in acres). Payments to Acquire Land Payments to Acquire Land Number of real estate ventures that owns land under development Number of real estate ventures that owns land under development Number of real estate ventures that owns land under development Area Owned By Real Estate Venture in Parcels Of Land Under Development Area Owned By Real Estate Venture in Parcels Of Land Under Development Area Owned By Real Estate Venture in Parcels Of Land Under Development Fair value of land, net of amount encumbered Fair value of land, net of amount encumbered Fair value of land, net of amount encumbered Equity Method Investment, Underlying Equity in Net Assets Equity Method Investment, Underlying Equity in Net Assets Number of real estate ventures developed hotel property Number of real estate ventures developed hotel property Number of real estate ventures developed hotel property Number of rooms in a hotel property developed by one Real Estate Venture Number Of Rooms Contain In One Real Estate Venture Developed As Hotel Property Number of rooms contain in one real estate venture developed as Hotel Property. Minimum ownership interest in unconsolidated Real Estate Ventures Minimum Percentage Of Unconsolidated Equity Method Investment Ownership Minimum percentage of unconsolidated equity method investment ownership. Maximum ownership interest in unconsolidated Real Estate Ventures Maximum Percentage Of Unconsolidated Equity Method Investment Ownership Maximum Percentage of Unconsolidated Equity Method Investment Ownership. Net gain (loss) on sale of undepreciated real estate Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Business Acquisition Purchase Price Allocation Building Business Acquisition Purchase Price Allocation Building Purchase price allocation related to acquisition - building. Business Acquisition Purchase Price Allocation, Land Portion Business Acquisition Purchase Price Allocation, Land Portion Business Acquisition Purchase Price Allocation, Land Portion Business Acquisition Purchase Price Allocation Intangible Assets Business Acquisition Purchase Price Allocation Intangible Assets Purchase price allocation related to acquisition - intangible assets. Business Acquisition Purchase Price Allocated To Market Lease Liabilities Business Acquisition Purchase Price Allocated To Market Lease Liabilities Purchase price allocation related to acquisition - below market lease liabilities assumed. Investments, Fair Value Disclosure Investments, Fair Value Disclosure Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Pro Forma [Abstract] Pro Forma [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Leases, Acquired-in-Place [Member] Leases, Acquired-in-Place [Member] Above Market Leases [Member] Above Market Leases [Member] Below Market Lease [Member] Below Market Lease [Member] Below Market Lease [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Net Income (Loss) Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Diluted Share Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted Earnings Per Share, Basic Earnings Per Share, Basic Pro Forma, Earnings Per Share, Basic Business Acquisition, Pro Forma Earnings Per Share, Basic Earnings Per Share, Diluted Earnings Per Share, Diluted Pro Forma Earnings Per Share, Diluted Business Acquisition, Pro Forma Earnings Per Share, Diluted Pennsylvania [Member] Pennsylvania [Member] Pennsylvania. 400 Berwyn Park [Member] 400 Berwyn Park [Member] 400 Berwyn Park [Member] 300 Berwyn Park [Member] 300 Berwyn Park [Member] 300 Berwyn Park [Member] 1050 Westlakes Drive [Member] 1050 Westlakes Drive [Member] 1050 Westlakes Drive [Member] 1200 Swedesford Road [Member] 1200 Swedesford Road [Member] 1200 Swedesford Road [Member] 200 Berwyn Park [Member] 200 Berwyn Park [Member] 200 Berwyn Park [Member] 1180 Swedesford Road 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Dabney Road [Member] 2277 Dabney Road [Member] 2277 Dabney Road [Member] 2277 Dabney Road [Member] 2248 Dabney Road [Member] 2248 Dabney Road [Member] 2248 Dabney Road [Member] 2161-2179 Tomlynn Street [Member] 2161-2179 Tomlynn Street [Member] 2161-2179 Tomlynn Street [Member] 2246 Dabney Road [Member] 2246 Dabney Road [Member] 2246 Dabney Road [Member] 2251 Dabney Road [Member] 2251 Dabney Road [Member] 2251 Dabney Road [Member] 2256 Dabney Road [Member] 2256 Dabney Road [Member] 2256 Dabney Road [Member] 2130-2146 Tomlynn Street [Member] 2130-2146 Tomlynn Street [Member] 2130-2146 Tomlynn Street [Member] 2120 Tomlynn Street [Member] 2120 Tomlynn Street [Member] 2120 Tomlynn Street [Member] 2240 Dabney Road [Member] 2240 Dabney Road [Member] 2240 Dabney Road [Member] Boulders Land [Member] Boulders Land [Member] Boulders Land [Member] 5900 & 5950 La Place Court [Member] 5900 & 5950 La Place Court [Member] 5900 & 5950 La Place Court [Member] 5963 La Place Court [Member] 5963 La Place Court [Member] 5963 La Place Court [Member] 2035 Corte Del Nogal [Member] 2035 Corte Del Nogal [Member] 2035 Corte Del Nogal [Member] 1200 Concord Avenue [Member] 1200 Concord Avenue [Member] 1200 Concord Avenue [Member] 1220 Concord Avenue [Member] 1220 Concord Avenue [Member] 1220 Concord Avenue [Member] 155 Grand Avenue [Member] 155 Grand Avenue [Member] 155 Grand Avenue [Member] Two Kaiser Plaza [Member] Two Kaiser Plaza [Member] Two Kaiser Plaza [Member] Oakland Lot B [Member] Oakland Lot B [Member] Oakland Lot B [Member] Encumbrances at December 31, 2012 SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances Initial Cost [Abstract] SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract] Land SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land Buildings and Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements Net Improvements (Retirements) Since Acquisition SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements Carrying Amount at Which Carried [Abstract] SEC Schedule III, Real Estate, Gross [Abstract] Land SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Land Buildings and Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements Total SEC Schedule III, Real Estate, Gross Accumulated Depreciation at December 31, 2013 SEC Schedule III, Real Estate Accumulated Depreciation Depreciable Life (Years) SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Major Types Of Debt And Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] 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] Liabilities: Liabilities [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Annual amortization of intangible assets and liabilities Finite-lived Intangible Assets Amortization Expense [Table Text Block] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Note Disclosure [Text Block] Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Real Estate [Abstract] Schedule of Significant Acquisitions and Disposals [Table] Schedule of Significant Acquisitions and Disposals [Table] Valleybrooke Office Park [Member] Valleybrooke Office Park [Member] Valleybrooke Office Park [Member] Development Project [Axis] Development Project [Axis] Development Project [Axis] Development Project [Domain] Development Project [Domain] [Domain] for Development Project [Axis] Encino Trace - Building I [Member] Encino Trace - Building I [Member] Encino Trace - Building I [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Encino Trace - Land [Member] Encino Trace - Land [Member] Encino Trace - Land [Member] One and Two Commerce Square [Member] One and Two Commerce Square [Member] One and Two Commerce Square [Member] Cira Ground Land Parcel [Member] Cira Ground Land Parcel [Member] Cira Ground Land Parcel [Member] Three Logan Square [Member] Three Logan Square [Member] Three Logan square. 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Net rentable space of property acquired Net Rentable Space Net Rentable Space. Acquisition related costs Business Acquisition, Transaction Costs Gain (Loss) on Sale of Properties Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Net gain (loss) on real estate venture transactions Net Gain (Loss) On Real Estate Venture Transactions, including real estate venture formation Net Gain (Loss) On Real Estate Venture Transactions, including real estate venture formation Number of flex/office properties sold Number of real estate properties sold Number of real estate properties sold Net rentable square feet of properties sold Net Rentable Space Sold Net Rentable Space Sold. Sales price of properties sold Sale Consideration Of Sold Property Sale Consideration Of Sold Property. Net gain (loss) on sale of undepreciated real estate Net gain (loss) on sale of undepreciated real estate Net gain (loss) on sale of undepreciated real estate Area Owned By Real Estate Venture Of Undeveloped Parcels Of Land Settlement period to finalize a business combination Settlement period to finalize a business combination Settlement period to finalize a business combination Other assets Other Assets Area Owned by Company of Undeveloped Parcels Of Land Area Owned by Company of Undeveloped Parcels Of Land Area Owned by Company of Undeveloped Parcels Of Land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Business Combination, return of capital on equity method investment Business Combination, return of capital on equity method investment Business Combination, return of capital on equity method investment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Business Combination, Total Cash Payment at Settlement Business Combination, Total Cash Payment at Settlement Business Combination, Total Cash Payment at Settlement Document and Entity Information [Abstract] Document And Entity Information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Consolidated debt obligations Schedule of Debt [Table Text Block] Summary of debt repurchases Summary Of Debt Repurchases [Table Text Block] Summary of debt repurchases table. Schedule of principal payments of debt obligations Schedule of Maturities of Long-term Debt [Table Text Block] Other Assets Disclosure [Abstract] Other Assets Disclosure [Abstract] Other Assets [Abstract] Other Assets [Abstract] Other assets Statement of Comprehensive Income [Abstract] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on derivative financial instruments Total comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive (income) loss attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to Brandywine Realty Trust Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Quarterly Financial Information [Line Items] Quarterly Financial Information [Line Items] Quarterly Financial Information [Line Items] Total revenue Real Estate Revenue, Net Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Note Receivable [Abstract] Note Receivable [Abstract] Tenant Receivable [Member] Tenant Receivable [Member] Tenant Receivable [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Straight Line Rent Adjustments Straight Line Rent Adjustments Deferred Gain on Sale of Property Proceeds from repayment of mortgage notes receivable Proceeds from Sale and Collection of Mortgage Notes Receivable Schedule of Extinguishment of Debt [Table] Schedule of Extinguishment of Debt [Table] Note Three [Member] Note Four [Member] Note Six [Member] 2012 5.750% Notes [Member] 2015 7.500% Notes [Member] Discharge of Debt [Member] Discharge of Debt [Member] Extinguishment of Debt [Line Items] Extinguishment of Debt [Line Items] Schedule of principal payments of debt obligations Extinguishment of Debt Disclosures [Abstract] Principal Extinguishment of Debt, Amount Repurchase Amount Gain (Loss) on Early Extinguishment of Debt Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost Acceleration of Deferred Financing Amortization Write off of Deferred Debt Issuance Cost Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of deferred financing costs Amortization of debt discount/(premium), net Amortization of Debt Discount (Premium) Amortization of stock compensation costs Share-based Compensation Shares used for employee taxes upon vesting of share awards Share-based compensation expense relating to awards withheld for employee taxes upon vesting of share awards Share-based compensation expense relating to awards withheld for employee taxes upon vesting of share awards Recognized hedge activity Straight-line rent income Straight Line Rent Amortization of above (below) Market Leases, Net Amortization of above and below Market Leases Straight-line ground rent expense Straight Line Ground Rent Expense Straight Line Ground Rent Expense. Provision for doubtful accounts Provision for Doubtful Accounts Net gain on sale of interests in real estate Gain (Loss) on Sale of Properties Loss on real estate venture formation Loss On Real Estate Venture Formation Loss on real estate venture formation Net gain on real estate venture transactions Net gain from remeasurement of investments in real estate ventures Net gain (loss) on real estate venture transactions Loss on early extinguishment of debt Historic tax credit transaction income Income Tax Credits and Adjustments Real estate venture income in excess of distributions Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Cumulative interest accretion of repayments of unsecured notes Cumulative interest accretion on repayments of unsecured notes Cumulative interest accretion on repayments of unsecured notes. Contributions from historic tax credit transaction, net of deferred costs Contributions From Historic Tax Credit Transaction Net Of Deferred Costs Contributions from historic tax credit transaction, net of deferred costs. Deferred financing obligation Increase (Decrease) in Deferred Charges Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Other assets Increase (Decrease) in Other Operating Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred income, gains and rent Increase (Decrease) in Deferred Revenue Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash from operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of properties Investments in available-for-sale securities Payments to Acquire Available-for-sale Securities, Debt Proceeds from the sale of available-for-sale securities Proceeds from Sale of Available-for-sale Securities Sales of properties, net Proceeds from Sale of Property, Plant, and Equipment Distribution of sales proceeds of real estate ventures Proceeds from Sale of Equity Method Investments Capital expenditures for tenant improvements Payments for Tenant Improvements Capital expenditures for redevelopments Payments to redevelop real estate Payments to redevelop real estate - Capital expenditures to redevelop real estate Capital expenditures for developments Payments to Acquire and Develop Real Estate Reimbursement from real estate venture pre-formation development costs Payments for (Proceeds from) Other Investing Activities Advances for purchase of tenant assets, net of repayments Advances To Tenant For Purchase Of Tenant Assets Advances to tenant for purchase of tenant assets. Loan proceeds from an unconsolidated real estate venture Loan proceeds from an unconsolidated Real Estate Venture partner Loan proceeds received from an unconsolidated Real Estate Venture Loan provided to unconsolidated real estate venture Loan Provided To Real Estate Venture Partner Loan provided to an unconsolidated Real Estate Venture partner. Investment in unconsolidated real estate venture Increase (Decrease) in escrow cash Increase (Decrease) in Restricted Cash Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital Leasing costs Payments for Leasing Costs, Commissions, and Tenant Improvements Net cash from (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from unsecured term loans Proceeds from Issuance of Unsecured Debt Proceeds from Credit Facility borrowings Proceeds from Long-term Lines of Credit Repayments of Credit Facility borrowings Repayments of Long-term Lines of Credit Repayments of mortgage notes payable Repayments of Secured Debt Proceeds from unsecured notes Proceeds from Unsecured Notes Payable Deferred financing obligation interest expense Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Net proceeds from issuance of preferred shares Proceeds from Issuance of Preferred Stock and Preference Stock Redemption of preferred units Payments for Repurchase of Preferred Stock and Preference Stock Redemption of partnership units Cash used in redemption of partnership units Cash used in redemption of partnership units Redemption of unsecured notes Repayments of unsecured term loan Repayments of Unsecured Debt Debt financing costs Payments of Financing Costs Exercise of stock options Proceeds from Stock Options Exercised Distributions paid to shareholders/unitholders Payments of Dividends Distributions to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Net cash from (used in) financing activities Net Cash Provided by (Used in) Financing Activities Increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash paid for interest, net of capitalized interest during the years ended December 31, 2014, 2013, and 2012 of $6,802, $3,137 and $2,560, respectively Interest Paid, Net Supplemental disclosure of non-cash activity: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Change in operating real estate related to a non-cash acquisition of an operating property Fair Value of Assets Acquired Change in operating real estate related to a non-cash acquisition of an operating property Noncash or Part Noncash Acquisition, Value of Assets Acquired Change in intangible assets, net related to non-cash acquisition of an operating property Noncash or Part Noncash Acquisition, Intangible Assets Acquired Change in acquired lease intangibles, net related to non-cash acquisition of an operating property NoncashOrPartNoncashAcquisitionIntangibleLiabilitiesAcquired Noncash Or Part Noncash Acquisition, Intangible Liabilities Acquired Change in investments in joint venture related to non-cash acquisition of property Noncash Or Part Noncash Acquisition, Investments in Joint Venture Acquired Noncash Or Part Noncash Acquisition, Investments in Joint Venture Change in investments in joint venture related to non-cash disposition of property Noncash Or Part Noncash Disposition, Investments in Joint Venture Noncash Or Part Noncash Disposition, Investments in Joint Venture Change in operating real estate related to non-cash adjustment to land Change in receivable from settlement of acquisitions Change in receivable from settlement of acquisitions Change in receivable from settlement of acquisitions Change in mortgage notes payable related to acquisition of an operating property Noncash or Part Noncash Acquisition, Debt Assumed Change in investments in joint venture related to a contribution