99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink 995200100 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 995200200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 995200500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 99940312 - Disclosure - Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 99940315 - Disclosure - Summary of Significant Accounting Policies - Net Income (Loss) Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - Property and Equipment and Capitalized Software and Curriculum (Details) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - Income Taxes - Deferred (Details) link:presentationLink link:calculationLink link:definitionLink 99940503 - Disclosure - Income Taxes - Components of income tax (Details) link:presentationLink link:calculationLink link:definitionLink 99940504 - Disclosure - Income Taxes - Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 99940506 - Disclosure - Income Taxes - Income Taxes Paid (Details) link:presentationLink link:calculationLink link:definitionLink 99940602 - Disclosure - Finance and Operating Leases - Finance leases (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Finance and Operating Leases - Finance leases (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 99940603 - Disclosure - Finance and Operating Leases - Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - Finance and Operating Leases - Operating Leases (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 99940604 - Disclosure - Finance and Operating Leases - Lease cost and other information (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Debt (Details) Calc2 link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - Description of the Business link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - Property and Equipment and Capitalized Software and Curriculum link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - Equity Incentive Plan link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - Employee Benefits link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - Supplemental Disclosure of Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS link:presentationLink link:calculationLink link:definitionLink 99920302 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 99930303 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - Property and Equipment and Capitalized Software and Curriculum (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - Equity Incentive Plan (Tables) link:presentationLink link:calculationLink link:definitionLink 99931503 - Disclosure - Supplemental Disclosure of Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - Description of the Business (Details) link:presentationLink link:calculationLink link:definitionLink 99940302 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 99940303 - Disclosure - Summary of Significant Accounting Policies - Disaggregated Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 99940304 - Disclosure - Summary of Significant Accounting Policies - Concentration of Customers (Details) link:presentationLink link:calculationLink link:definitionLink 99940305 - Disclosure - Summary of Significant Accounting Policies - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 99940307 - Disclosure - Summary of Significant Accounting Policies - Investments in Marketable Securities (Details) link:presentationLink link:calculationLink link:definitionLink 99940308 - Disclosure - Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 99940310 - Disclosure - Summary of Significant Accounting Policies - Capitalized Software-as-a-Service Costs (Details) link:presentationLink link:calculationLink link:definitionLink 99940311 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 99940313 - Disclosure - Summary of Significant Accounting Policies - Advertising and Marketing Costs (Details) link:presentationLink link:calculationLink link:definitionLink 99940314 - Disclosure - Summary of Significant Accounting Policies - Fair Value Measurement (Details) link:presentationLink link:calculationLink link:definitionLink 99940502 - Disclosure - Income Taxes - Carryforward (Details) link:presentationLink link:calculationLink link:definitionLink 99940505 - Disclosure - Income Taxes - Tax Uncertainties (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - Finance and Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 99940703 - Disclosure - Debt - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - Equity Incentive Plan (Details) link:presentationLink link:calculationLink link:definitionLink 99940802 - Disclosure - Equity Incentive Plan - Restricted Stock Awards (Details) link:presentationLink link:calculationLink link:definitionLink 99940803 - Disclosure - Equity Incentive Plan - Performance Share Units ("PSU") (Details) link:presentationLink link:calculationLink link:definitionLink 99940804 - Disclosure - Equity Incentive Plan - Long Term Incentive Plan (LTIP) (Details) link:presentationLink link:calculationLink link:definitionLink 99940805 - Disclosure - Equity Incentive Plan - Deferred Stock Units ("DSU") (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - Severance (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - Employee Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - Supplemental Disclosure of Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - Finance and Operating Leases link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - Employee Stock Purchase Plan link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - Stock Repurchase Program link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - Severance link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - Finance and Operating Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - Summary of Significant Accounting Policies - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 99940306 - Disclosure - Summary of Significant Accounting Policies - Performance Obligations and Research and Development Costs (Details) link:presentationLink link:calculationLink link:definitionLink 99940309 - Disclosure - Summary of Significant Accounting Policies - Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 99940702 - Disclosure - Debt - Maturities of long-term debt (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - Stock Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink