CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 18,320	$ 5,514
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	15,838	18,012
Amortization	84,528	86,992
Amortization of operating lease right-of-use assets	7,752	14,145
Amortization of deferred debt issuance costs	3,525	3,613
Deferred income taxes	(11,742)	(10,540)
Stock-based compensation expense	20,790	22,943
Other	(27)	4,339
Changes in operating assets and liabilities:
Receivables	55,953	41,261
Accounts payable	(5,080)	1,680
Accrued employee compensation	(1,140)	13,585
Deferred revenue	10,339	14,361
Other current and noncurrent assets and liabilities	(51,158)	(23,847)
Net cash flows from operating activities	147,898	192,058
Cash flows from investing activities:
Purchases of property and equipment	(12,968)	(14,091)
Purchases of software and distribution rights	(20,041)	(21,556)
Net cash flows from investing activities	(33,009)	(35,647)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,526	2,853
Proceeds from exercises of stock options	7,252	6,518
Repurchase of stock-based compensation awards for tax withholdings	(14,833)	(11,150)
Repurchases of common stock	(39,411)	(28,881)
Proceeds from revolving credit facility	0	30,000
Repayment of revolving credit facility	(55,000)	(109,000)
Repayment of term portion of credit agreement	(29,212)	(29,212)
Payments on or proceeds from other debt, net	(10,187)	(10,044)
Net cash flows from financing activities	(138,865)	(148,916)
Effect of exchange rate fluctuations on cash	84	4,952
Net increase (decrease) in cash and cash equivalents	(23,892)	12,447
Cash and cash equivalents, beginning of period	165,374	121,398
Cash and cash equivalents, end of period	141,482	133,845
Supplemental cash flow information
Income taxes paid	28,131	19,733
Interest paid	$ 35,966	$ 46,489