000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Consolidated Balance Sheets link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Consolidated Balance Sheets (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Consolidated Statements of Operations and Comprehensive Income link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statements of Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Cash Flows link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Separation from Graham Holdings Company and Description of Business link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Revenues link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Property, Plant and Equipment link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Goodwill and Intangible Assets link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Long-term Debt link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Treasury Stock link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Equity-based Compensation link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Postemployment Benefit Plans, Pre-spin link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Postemployment Benefit Plans, Post-spin link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Defined Benefit Postretirement Plan link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Net Income Per Share link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 16 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 022 - Disclosure - Note 17 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 023 - Document - Note 18 - Summary of Quarterly Operating Results link:calculationLink link:definitionLink link:presentationLink 024 - Disclosure - Note 19 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 025 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 026 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 027 - Disclosure - Note 3 - Revenues (Tables) link:calculationLink link:definitionLink link:presentationLink 028 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 029 - Disclosure - Note 5 - Property, Plant and Equipment (Tables) link:calculationLink link:definitionLink link:presentationLink 030 - Disclosure - Note 6 - Goodwill and Intangible Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 031 - Disclosure - Note 7 - Long-term Debt (Tables) link:calculationLink link:definitionLink link:presentationLink 032 - Disclosure - Note 8 - Income Taxes (Tables) link:calculationLink link:definitionLink link:presentationLink 033 - Disclosure - Note 9 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 034 - Disclosure - Note 11 - Equity-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 035 - Disclosure - Note 14 - Defined Benefit Postretirement Plan (Tables) link:calculationLink link:definitionLink link:presentationLink 036 - Disclosure - Note 15 - Net Income Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 037 - Disclosure - Note 16 - Related Party Transactions (Tables) link:calculationLink link:definitionLink link:presentationLink 038 - Disclosure - Note 17 - Commitments and Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 039 - Disclosure - Note 18 - Summary of Quarterly Operating Results (Tables) link:calculationLink link:definitionLink link:presentationLink 040 - Disclosure - Note 1 - Separation from Graham Holdings Company and Description of Business (Details Textual) link:calculationLink link:definitionLink link:presentationLink 041 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 042 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Lives (Details) link:calculationLink link:definitionLink link:presentationLink 043 - Disclosure - Note 3 - Revenues (Details Textual) link:calculationLink link:definitionLink link:presentationLink 044 - Disclosure - Note 3 - Revenues - Revenues by Product Line (Details) link:calculationLink link:definitionLink link:presentationLink 045 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 046 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities - Summary of Accounts Receivable (Details) link:calculationLink link:definitionLink link:presentationLink 047 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities - Allowance for Doubtful Accounts (Details) link:calculationLink link:definitionLink link:presentationLink 048 - Disclosure - Note 4 - Accounts Receivable, Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 049 - Disclosure - Note 5 - Property, Plant and Equipment (Details Textual) link:calculationLink link:definitionLink link:presentationLink 050 - Disclosure - Note 5 - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) link:calculationLink link:definitionLink link:presentationLink 051 - Disclosure - Note 6 - Goodwill and Intangible Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 052 - Disclosure - Note 6 - Goodwill and Intangible Assets - Intangible Assets (Details) link:calculationLink link:definitionLink link:presentationLink 053 - Disclosure - Note 7 - Long-term Debt (Details Textual) link:calculationLink link:definitionLink link:presentationLink 054 - Disclosure - Note 7 - Long-term Debt - Schedule of Long-term Debt (Details) link:calculationLink link:definitionLink link:presentationLink 055 - Disclosure - Note 7 - Long-term Debt - Future Maturities (Details) link:calculationLink link:definitionLink link:presentationLink 056 - Disclosure - Note 8 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 057 - Disclosure - Note 8 - Income Taxes - Provision for Income Taxes (Details) link:calculationLink link:definitionLink link:presentationLink 058 - Disclosure - Note 8 - Income Taxes - Income Tax Rate Reconciliation (Details) link:calculationLink link:definitionLink link:presentationLink 059 - Disclosure - Note 8 - Income Taxes - Deferred Income Taxes (Details) link:calculationLink link:definitionLink link:presentationLink 060 - Disclosure - Note 9 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 061 - Disclosure - Note 9 - Fair Value Measurements - Carrying Amounts and Fair Values (Details) link:calculationLink link:definitionLink link:presentationLink 062 - Disclosure - Note 10 - Treasury Stock (Details Textual) link:calculationLink link:definitionLink link:presentationLink 063 - Disclosure - Note 11 - Equity-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 064 - Disclosure - Note 11 - Equity-based Compensation - Summary of Restricted Stock (Details) link:calculationLink link:definitionLink link:presentationLink 065 - Disclosure - Note 11 - Equity-based Compensation - Summary of Stock Appreciation Rights (Details) link:calculationLink link:definitionLink link:presentationLink 066 - Disclosure - Note 11 - Equity-based Compensation - Stock Appreciation Rights, Fair Value Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 067 - Disclosure - Note 12 - Postemployment Benefit Plans, Pre-spin (Details Textual) link:calculationLink link:definitionLink link:presentationLink 068 - Disclosure - Note 13 - Postemployment Benefit Plans, Post-spin (Details Textual) link:calculationLink link:definitionLink link:presentationLink 069 - Disclosure - Note 14 - Defined Benefit Postretirement Plan (Details Textual) link:calculationLink link:definitionLink link:presentationLink 070 - Disclosure - Note 14 - Defined Benefit Postretirement Plan - Asset and Funding Information (Details) link:calculationLink link:definitionLink link:presentationLink 071 - Disclosure - Note 14 - Defined Benefit Postretirement Plan - Amounts Recognized in Balance Sheet (Details) link:calculationLink link:definitionLink link:presentationLink 072 - Disclosure - Note 14 - Defined Benefit Postretirement Plan - Future Estimated Benefit Payments (Details) link:calculationLink link:definitionLink link:presentationLink 073 - Disclosure - Note 14 - Defined Benefit Postretirement Plan - Amortization Components of Net Periodic (Details) link:calculationLink link:definitionLink link:presentationLink 074 - Disclosure - Note 15 - Net Income Per Share (Details Textual) link:calculationLink link:definitionLink link:presentationLink 075 - Disclosure - Note 15 - Net Income Per Share - Computation of Basic and Diluted Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 076 - Disclosure - Note 16 - Related Party Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 077 - Disclosure - Note 16 - Related Party Transactions - Components of Net Transfers to Parent (Details) link:calculationLink link:definitionLink link:presentationLink 078 - Disclosure - Note 17 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 079 - Disclosure - Note 17 - Commitments and Contingencies - Contractual Obligation Maturity (Details) link:calculationLink link:definitionLink link:presentationLink 080 - Disclosure - Note 18 - Summary of Quarterly Operating Results - Quarterly Financial Data (Details) link:calculationLink link:definitionLink link:presentationLink 081 - Disclosure - Note 19 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink