CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (34,002)	$ (31,417)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation	11,875	12,573
Amortization	37,469	38,646
Amortization of deferred debt issuance costs	1,445	2,760
Deferred income taxes	(3,044)	(30,121)
Stock-based compensation expense	14,067	14,640
Other	(248)	443
Changes in operating assets and liabilities
Receivables	67,689	70,564
Accounts payable	(3,658)	(3,929)
Accrued employee compensation	(5,805)	(4,260)
Current income taxes	(7,243)	(9,592)
Deferred revenue	10,142	841
Other current and noncurrent assets and liabilities	(17,576)	37,949
Net cash flows from operating activities	71,111	99,097
Cash flows from investing activities:
Purchases of property and equipment	(11,108)	(11,809)
Purchases of software and distribution rights	(16,776)	(14,426)
Other	(1,467)
Net cash flows from investing activities	(29,351)	(26,235)
Cash flows from financing activities:
Proceeds from issuance of common stock	1,564	1,441
Proceeds from exercises of stock options	14,906	7,949
Repurchase of restricted stock for tax withholdings	(2,588)	(4,770)
Repurchases of common stock	(54,527)
Proceeds from revolving credit facility	85,000	12,000
Repayment of revolving credit facility	(84,000)	(100,000)
Proceeds from term portion of credit agreement		415,000
Repayment of term portion of credit agreement	(10,375)	(375,665)
Payment of debt issuance costs		(5,340)
Payments on other debt and capital leases	(1,550)	(6,021)
Net cash flows from financing activities	(51,570)	(55,406)
Effect of exchange rate fluctuations on cash	(867)	2,148
Net increase (decrease) in cash and cash equivalents	(10,677)	19,604
Cash and cash equivalents, beginning of period	69,710	75,753
Cash and cash equivalents, end of period	59,033	95,357
Supplemental cash flow information
Income taxes paid	20,613	19,605
Interest paid	$ 17,297	$ 16,937