CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (19,428)	$ (1,608)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation	5,926	6,274
Amortization	19,067	19,364
Amortization of deferred debt issuance costs	699	1,734
Deferred income taxes	(4,827)	(5,919)
Stock-based compensation expense	6,362	6,297
Other	(663)	538
Changes in operating assets and liabilities
Receivables	68,741	84,033
Accounts payable	(2,611)	(3,689)
Accrued employee compensation	(14,743)	(12,421)
Current income taxes	(3,569)	(3,339)
Deferred revenue	11,326	9,049
Other current and noncurrent assets and liabilities	(21,144)	(14,627)
Net cash flows from operating activities	45,136	85,686
Cash flows from investing activities:
Purchases of property and equipment	(5,937)	(6,566)
Purchases of software and distribution rights	(6,652)	(5,839)
Net cash flows from investing activities	(12,589)	(12,405)
Cash flows from financing activities:
Proceeds from issuance of common stock	753	693
Proceeds from exercises of stock options	9,118	7,035
Repurchase of restricted stock for tax withholdings	(914)	(3,155)
Repurchases of common stock	(31,113)
Proceeds from revolving credit facility	48,000	12,000
Repayment of revolving credit facility	(50,000)	(100,000)
Proceeds from term portion of credit agreement		415,000
Repayment of term portion of credit agreement	(5,187)	(370,477)
Payment of debt issuance costs		(5,340)
Payments on other debt and capital leases	(352)	(4,629)
Net cash flows from financing activities	(29,695)	(48,873)
Effect of exchange rate fluctuations on cash	1,719	(417)
Net increase in cash and cash equivalents	4,571	23,991
Cash and cash equivalents, beginning of period	69,710	75,753
Cash and cash equivalents, end of period	74,281	99,744
Supplemental cash flow information
Income taxes paid	8,263	6,919
Interest paid	$ 13,127	$ 13,421