Unaudited Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Total revenues	$ 406,303	$ 334,167	$ 1,259,079	$ 1,004,610
Cost of revenues
Operating expenses	55,600	44,169	163,302	122,265
Depreciation and amortization	13,341	10,935	38,299	31,405
Total cost of revenues	68,941	55,104	201,601	153,670
Administrative expenses
Sales and marketing	101,162	91,114	311,171	253,834
Research and development	51,864	40,366	143,651	108,774
General and administrative	71,827	60,693	213,397	179,109
Depreciation and amortization	15,608	12,625	44,660	36,378
Total administrative expenses	240,461	204,798	712,879	578,095
Total operating expenses	309,402	259,902	914,480	731,765
Operating income	96,901	74,265	344,599	272,845
Interest expense	(222)	(1,018)	(1,661)	(1,587)
Other income (expense), net	5,362	2,041	17,549	4,331
Income before income taxes	102,041	75,288	360,487	275,589
Provision for income taxes	26,822	23,135	101,456	74,151
Net income	$ 75,219	$ 52,153	$ 259,031	$ 201,438
Earnings per share, basic	$ 1.3	$ 0.9	$ 4.48	$ 3.48
Earnings per share, diluted	$ 1.3	$ 0.9	$ 4.46	$ 3.46
Weighted average shares outstanding:
Basic	57,825	57,865	57,871	57,949
Diluted	57,966	58,033	58,056	58,193
Comprehensive earnings (loss):
Net income	$ 75,219	$ 52,153	$ 259,031	$ 201,438
Unrealized net gains (losses) on available-for-sale securities	1,232	(2,705)	2,047	(4,881)
Tax effect	(420)	492	(525)	1,068
Other comprehensive income (loss), net of tax	812	(2,213)	1,522	(3,813)
Comprehensive earnings (loss)	76,031	49,940	260,553	197,625
Recurring [Member]
Revenues
Total revenues	398,763	328,150	1,237,706	987,848
Implementation and Other [Member]
Revenues
Total revenues	$ 7,540	$ 6,017	$ 21,373	$ 16,762