0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 0000002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000006 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000007 - Disclosure - Recent Accounting Pronouncements Recent Accounting Pronouncements (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000008 - Disclosure - Revenue and Deferred Costs Revenue and Deferred Costs (Notes) link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - Fair Value Measures and Disclosures link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Leases Leases (Notes) link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Debt (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Income Taxes (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Stock Based Compensation (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Earnings Per Share Earnings Per Share (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Business Acquisitions (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Reportable Segment Information (Text Block) link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Subsequent Events Subsequent Events (Text Block) link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Fair Value Measures and Disclosures (Policies) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - Leases Leases (Policies) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies- Loss on Disposal of Assets, net (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - Revenue and Deferred Costs Revenue and Deferred Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - Fair Value Measures and Disclosures (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - Leases Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - 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Disclosure - Nature of Operations and Summary of Significant Accounting Policies Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies Purchase of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies Treasury Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Revenue and Deferred Costs Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Revenue and Deferred Costs Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Revenue and Deferred Costs Revenue Recognition Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Revenue and Deferred Costs Revenue Recognition Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Revenue and Deferred Costs Contract Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Fair Value Measures and Disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Leases Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Leases Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Leases Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Debt Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Income Taxes Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Stock Based Compensation Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - 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