1001 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 1005 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 1006 - Disclosure - Recent Accounting Pronouncements link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - Revenue link:presentationLink link:definitionLink link:calculationLink 1008 - Disclosure - Intangible Assets link:presentationLink link:definitionLink link:calculationLink 1009 - Disclosure - Common Stock and Treasury Stock link:presentationLink link:definitionLink link:calculationLink 1010 - Disclosure - Discontinued Operations link:presentationLink link:definitionLink link:calculationLink 1011 - Disclosure - Acquisitions and Dispositions link:presentationLink link:definitionLink link:calculationLink 1012 - Disclosure - Income taxes link:presentationLink link:definitionLink link:calculationLink 1013 - Disclosure - Stock-Based Compensation link:presentationLink link:definitionLink link:calculationLink 1014 - Disclosure - Long-Term Debt link:presentationLink link:definitionLink link:calculationLink 1015 - Disclosure - Litigation link:presentationLink link:definitionLink link:calculationLink 1016 - Disclosure - Dividends link:presentationLink link:definitionLink link:calculationLink 1017 - Disclosure - Subsequent Events link:presentationLink link:definitionLink link:calculationLink 1018 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 1019 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:definitionLink link:calculationLink 1020 - Disclosure - Revenue (Tables) link:presentationLink link:definitionLink link:calculationLink 1021 - Disclosure - Common Stock and Treasury Stock (Tables) link:presentationLink link:definitionLink link:calculationLink 1022 - Disclosure - Discontinued Operations (Tables) link:presentationLink link:definitionLink link:calculationLink 1023 - Disclosure - Acquisitions and Dispositions (Tables) link:presentationLink link:definitionLink link:calculationLink 1024 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:definitionLink link:calculationLink 1025 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:definitionLink link:calculationLink 1026 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:definitionLink link:calculationLink 1027 - Disclosure - Summary of Significant Accounting Policies (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1028 - Disclosure - Recent Accounting Pronouncements (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1029 - 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Disclosure - Acquisitions and Dispositions (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1039 - Disclosure - Income taxes (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1040 - Disclosure - Stock-Based Compensation (Details) link:presentationLink link:definitionLink link:calculationLink 1041 - Disclosure - Stock-Based Compensation (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1042 - Disclosure - Long-Term Debt (Details) link:presentationLink link:definitionLink link:calculationLink 1043 - Disclosure - Long-Term Debt (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1044 - Disclosure - Dividends (Details Textual) link:presentationLink link:definitionLink link:calculationLink 1045 - Disclosure - Subsequent Events (Details Textual) link:presentationLink link:definitionLink link:calculationLink