CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Total revenues		$ 1,452,579	$ 1,421,901	$ 1,370,598
Operating expenses
Cost of revenue	[1]	719,211	696,071	638,871
Research and development		140,758	146,311	144,310
Selling and marketing		132,639	134,812	126,539
General and administrative		117,190	114,194	123,801
Depreciation and amortization		122,373	126,678	127,180
Total operating expenses		1,232,171	1,218,066	1,160,701
Operating income		220,408	203,835	209,897
Other income (expense)
Interest expense		(78,486)	(53,193)	(45,060)
Interest income		14,215	12,547	11,522
Other, net		(8,510)	43,446	(1,294)
Total other income (expense)		(72,781)	2,800	(34,832)
Income before income taxes		147,627	206,635	175,065
Income tax expense		26,118	64,458	47,274
Net income		$ 121,509	$ 142,177	$ 127,791
Income per common share
Basic (in dollars per share)		$ 1.12	$ 1.25	$ 1.09
Diluted (in dollars per share)		$ 1.12	$ 1.24	$ 1.08
Weighted average common shares outstanding
Basic (in shares)		108,497	113,700	117,407
Diluted (in shares)		108,857	114,238	118,647
Software as a service and platform as a service
Revenues
Total revenues		$ 849,147	$ 802,880	$ 774,342
License
Revenues
Total revenues		321,224	348,134	319,867
Maintenance
Revenues
Total revenues		205,068	200,045	210,499
Services
Revenues
Total revenues		$ 77,140	$ 70,842	$ 65,890

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