Unaudited Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Total revenues	$ 451,934	$ 406,303	$ 1,389,327	$ 1,259,079
Cost of revenues
Operating expenses	70,818	55,600	201,939	163,302
Depreciation and amortization	17,535	13,341	48,929	38,299
Total cost of revenues	88,353	68,941	250,868	201,601
Administrative expenses
Sales and marketing	104,477	101,162	326,865	311,171
Research and development	63,047	51,864	175,927	143,651
General and administrative	70,642	71,827	92,610	213,397
Depreciation and amortization	20,541	15,608	57,229	44,660
Total administrative expenses	258,707	240,461	652,631	712,879
Total operating expenses	347,060	309,402	903,499	914,480
Operating income	104,874	96,901	485,828	344,599
Interest expense	(789)	(222)	(2,353)	(1,661)
Other income (expense), net	4,229	5,362	14,025	17,549
Income before income taxes	108,314	102,041	497,500	360,487
Provision for income taxes	35,036	26,822	109,065	101,456
Net income	$ 73,278	$ 75,219	$ 388,435	$ 259,031
Earnings per share, basic	$ 1.31	$ 1.3	$ 6.9	$ 4.48
Earnings per share, diluted	$ 1.31	$ 1.3	$ 6.89	$ 4.46
Weighted average shares outstanding:
Basic	55,929	57,825	56,307	57,871
Diluted	55,964	57,966	56,365	58,056
Comprehensive earnings:
Net income	$ 73,278	$ 75,219	$ 388,435	$ 259,031
Unrealized net gains on available-for-sale securities	101	1,232	1,256	2,047
Tax effect	24	(420)	(397)	(525)
Other comprehensive income, net of tax	125	812	859	1,522
Comprehensive earnings:	73,403	76,031	389,294	260,553
Recurring [Member]
Revenues
Total revenues	445,002	398,763	1,367,298	1,237,706
Implementation and Other [Member]
Revenues
Total revenues	$ 6,932	$ 7,540	$ 22,029	$ 21,373