Unaudited Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Total revenues	$ 437,512	$ 401,139	$ 937,393	$ 852,776
Cost of revenues
Operating expenses	67,451	54,617	131,121	107,702
Depreciation and amortization	16,433	12,811	31,394	24,958
Total cost of revenues	83,884	67,428	162,515	132,660
Administrative expenses
Sales and marketing	106,864	106,435	222,388	210,009
Research and development	62,371	49,118	112,880	91,787
General and administrative	70,072	75,965	21,968	141,570
Depreciation and amortization	19,181	14,927	36,688	29,052
Total administrative expenses	258,488	246,445	393,924	472,418
Total operating expenses	342,372	313,873	556,439	605,078
Operating income	95,140	87,266	380,954	247,698
Interest expense	(782)	(602)	(1,564)	(1,439)
Other income (expense), net	4,787	6,183	9,796	12,187
Income before income taxes	99,145	92,847	389,186	258,446
Provision for income taxes	31,175	28,331	74,029	74,634
Net income	$ 67,970	$ 64,516	$ 315,157	$ 183,812
Earnings per share, basic	$ 1.2	$ 1.11	$ 5.58	$ 3.17
Earnings per share, diluted	$ 1.2	$ 1.11	$ 5.57	$ 3.17
Weighted average shares outstanding:
Basic	56,451	57,920	56,499	57,895
Diluted	56,771	58,033	56,548	58,050
Comprehensive earnings:
Net income	$ 67,970	$ 64,516	$ 315,157	$ 183,812
Unrealized net gains on available-for-sale securities	318	(235)	1,155	815
Tax effect	(128)	95	(421)	(105)
Other comprehensive income, net of tax	190	(140)	734	710
Comprehensive earnings:	68,160	64,376	315,891	184,522
Recurring [Member]
Revenues
Total revenues	430,400	394,522	922,296	838,943
Implementation and Other [Member]
Revenues
Total revenues	$ 7,112	$ 6,617	$ 15,097	$ 13,833