CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 72,626	$ 26,889
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	10,583	10,588
Amortization	40,272	36,605
Amortization of deferred debt issuance costs	2,826	3,212
Deferred income taxes	3,578	(3,961)
Stock-based compensation expense	22,572	9,291
Excess tax benefit of stock-based compensation	(701)	(4,407)
Gain on sale of available-for-sale securities		(24,465)
Gain on sale of CFS assets	(151,952)
Other	(762)	1,456
Changes in operating assets and liabilities, net of impact of acquisitions and divestiture:
Receivables	29,299	(3,411)
Accounts payable	(3,247)	(7,016)
Accrued employee compensation	11,946	7,240
Current income taxes	10,998	(3,635)
Deferred revenue	8,919	2,653
Other current and noncurrent assets and liabilities	(89)	(1,106)
Net cash flows from operating activities	56,868	49,933
Cash flows from investing activities:
Purchases of property and equipment	(20,728)	(13,408)
Purchases of software and distribution rights	(12,384)	(8,496)
Proceeds from sale of available-for-sale securities		35,311
Proceeds from sale of CFS assets	200,000
Other	(7,000)	(7,000)
Net cash flows from investing activities	159,888	6,407
Cash flows from financing activities:
Proceeds from issuance of common stock	1,532	1,524
Proceeds from exercises of stock options	7,986	10,634
Excess tax benefit of stock-based compensation	701	4,407
Repurchase of restricted stock and performance shares for tax withholdings	(1,446)	(4,047)
Repurchases of common stock	(60,089)
Proceeds from revolving credit facility		65,000
Repayment of revolving credit facility	(156,000)	(109,000)
Repayment of term portion of credit agreement	(47,646)	(39,706)
Payments on other debt	(10,210)	(10,120)
Net cash flows from financing activities	(265,172)	(81,308)
Effect of exchange rate fluctuations on cash	(1,360)	(1,936)
Net decrease in cash and cash equivalents	(49,776)	(26,904)
Cash and cash equivalents, beginning of period	102,239	77,301
Cash and cash equivalents, end of period	52,463	50,397
Supplemental cash flow information
Income taxes paid, net	5,857	13,875
Interest paid	$ 17,772	$ 18,181