CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 5,135	$ 129,535	[1]	$ 85,436
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	24,871	22,584		21,656
Amortization	77,353	80,870		75,775
Amortization of deferred debt issuance costs	4,286	5,567		6,244
Deferred income taxes	21,660	17,702		19,328
Stock-based compensation expense	13,683	43,613		18,380
Gain on sale of available-for-sale equity securities				(24,465)
Gain on sale of CFS assets		(151,463)
Other	435	806		2,725
Changes in operating assets and liabilities, net of impact of acquisitions:
Receivables	(8,243)	(76,460)		(11,355)
Accounts payable	(1,700)	(13,920)		8,557
Accrued employee compensation	94	18,060		(1,998)
Current income taxes	(4,227)	14,510		(8,244)
Deferred revenue	439	3,015		(4,513)
Other current and noncurrent assets and liabilities	12,411	5,411		468
Net cash flows from operating activities	146,197	99,830		187,994
Cash flows from investing activities:
Purchases of property and equipment	(25,717)	(40,812)		(27,283)
Purchases of software and distribution rights	(28,697)	(22,268)		(21,622)
Proceeds from sale of available-for-sale equity securities				35,311
Proceeds from sale of CFS assets		199,481
Acquisition of businesses, net of cash acquired		232		(179,367)
Other		(7,000)		(7,000)
Net cash flows from investing activities	(54,414)	129,633		(199,961)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,958	2,987		3,104
Proceeds from exercises of stock options	13,872	9,325		12,175
Repurchases of common stock	(37,387)	(60,089)
Repurchase of restricted stock and performance shares for tax withholdings	(5,311)	(2,975)		(4,649)
Proceeds from revolving credit facility	67,000	76,000		298,000
Proceeds from term portion of credit agreement	415,000
Repayments of revolving credit facility	(153,000)	(166,000)		(164,000)
Repayments of term portion of credit agreement	(386,040)	(95,293)		(87,352)
Payments on other debt and capital leases	(9,900)	(14,376)		(12,638)
Payment for debt issuance costs	(5,340)	(655)
Net cash flows from financing activities	(98,148)	(251,076)		44,640
Effect of exchange rate fluctuations on cash	322	(4,873)		(7,735)
Net increase (decrease) in cash and cash equivalents	(6,043)	(26,486)		24,938
Cash and cash equivalents, beginning of period	75,753	102,239		77,301
Cash and cash equivalents, end of period	69,710	75,753		102,239
Supplemental cash flow information
Income taxes paid, net	37,817	19,081		24,036
Interest paid	$ 34,976	$ 35,053		$ 35,183

[1] The Company adopted ASU 2016-09, Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting, ("ASU 2016-09") during the year ended December 31, 2016. The Company elected to early adopt ASU 2016-09 in the third quarter of 2016, which requires it to reflect any adjustments as of January 1, 2016, the beginning of the annual period that includes the interim period of adoption. The impact of the adoption to the Company's previously reported quarterly results for the quarters ended March 31 and June 30, 2016 are reflected in the table above.