CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Total revenues		$ 1,421,901	$ 1,370,598	$ 1,294,322
Operating expenses
Cost of revenue	[1]	696,071	638,871	622,459
Research and development		146,311	144,310	139,293
Selling and marketing		134,812	126,539	103,567
General and administrative		114,194	123,801	152,468
Depreciation and amortization		126,678	127,180	131,791
Total operating expenses		1,218,066	1,160,701	1,149,578
Operating income		203,835	209,897	144,744
Other income (expense)
Interest expense		(53,193)	(45,060)	(56,630)
Interest income		12,547	11,522	11,628
Other, net		43,446	(1,294)	(1,116)
Total other income (expense)		2,800	(34,832)	(46,118)
Income before income taxes		206,635	175,065	98,626
Income tax expense		64,458	47,274	25,966
Net income		$ 142,177	$ 127,791	$ 72,660
Income per common share
Basic (in dollars per share)		$ 1.25	$ 1.09	$ 0.62
Diluted (in dollars per share)		$ 1.24	$ 1.08	$ 0.62
Weighted average common shares outstanding
Basic (in shares)		113,700	117,407	116,397
Diluted (in shares)		114,238	118,647	118,079
Software as a service and platform as a service
Revenues
Total revenues		$ 802,880	$ 774,342	$ 769,180
License
Revenues
Total revenues		348,134	319,867	246,896
Maintenance
Revenues
Total revenues		200,045	210,499	211,697
Services
Revenues
Total revenues		$ 70,842	$ 65,890	$ 66,549

[1] The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.