CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 62,844	$ 41,669
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	16,130	15,919
Amortization	59,708	54,929
Amortization of deferred debt issuance costs	4,198	4,754
Deferred income taxes	(1,561)	3,773
Stock-based compensation expense	33,812	10,050
Gain on sale of available-for-sale securities		(24,465)
Gain on sale of CFS assets	(151,463)
Other, net	(407)	2,467
Changes in operating assets and liabilities, net of impact of acquisitions and divestiture:
Receivables	34,784	31,566
Accounts payable	(15,898)	(5,441)
Accrued employee compensation	18,260	7,141
Current income taxes	5,691	(8,080)
Deferred revenue	3,663	(4,813)
Other current and noncurrent assets and liabilities	(4,905)	(5,626)
Net cash flows from operating activities	64,856	123,843
Cash flows from investing activities:
Purchases of property and equipment	(34,429)	(19,546)
Purchases of software and distribution rights	(19,211)	(12,017)
Proceeds from sale of available-for-sale equity securities		35,311
Proceeds from sale of CFS assets	199,481
Other	(7,000)	(7,000)
Net cash flows from investing activities	138,841	(3,252)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,395	2,298
Proceeds from exercises of stock options	8,749	11,554
Repurchases of common stock	(60,089)
Repurchase of restricted stock and performance shares for tax withholdings	(2,975)	(4,553)
Proceeds from revolving credit facility	52,000	112,000
Repayment of revolving credit facility	(166,000)	(156,000)
Repayment of term portion of credit agreement	(71,470)	(63,530)
Payments on other debt	(13,538)	(11,785)
Payment for debt issuance costs	(370)
Net cash flows from financing activities	(251,298)	(110,016)
Effect of exchange rate fluctuations on cash	(3,726)	(7,019)
Net increase (decrease) in cash and cash equivalents	(51,327)	3,556
Cash and cash equivalents, beginning of period	102,239	77,301
Cash and cash equivalents, end of period	50,912	80,857
Supplemental cash flow information
Income taxes paid, net	11,986	17,169
Interest paid	$ 31,107	$ 31,424