Unaudited Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Total revenues	$ 334,167	$ 256,194	$ 1,004,610	$ 770,538
Cost of revenues
Operating expenses	44,169	34,766	122,265	92,612
Depreciation and amortization	10,935	7,914	31,405	22,751
Total cost of revenues	55,104	42,680	153,670	115,363
Administrative expenses
Sales and marketing	91,114	69,745	253,834	200,485
Research and development	40,366	31,077	108,774	84,012
General and administrative	60,693	59,980	179,109	160,234
Depreciation and amortization	12,625	9,407	36,378	25,503
Total administrative expenses	204,798	170,209	578,095	470,234
Total operating expenses	259,902	212,889	731,765	585,597
Operating income	74,265	43,305	272,845	184,941
Interest expense	(1,018)		(1,587)
Other income (expense), net	2,041	244	4,331	1,019
Income before income taxes	75,288	43,549	275,589	185,960
Provision for income taxes	23,135	13,170	74,151	38,687
Net income	$ 52,153	$ 30,379	$ 201,438	$ 147,273
Earnings per share, basic	$ 0.90	$ 0.52	$ 3.48	$ 2.55
Earnings per share, diluted	$ 0.90	$ 0.52	$ 3.46	$ 2.53
Weighted average shares outstanding:
Basic	57,865	57,935	57,949	57,843
Diluted	58,033	58,190	58,193	58,192
Comprehensive earnings (loss):
Net income	$ 52,153	$ 30,379	$ 201,438	$ 147,273
Unrealized net gains (losses) on available-for-sale securities	(2,705)		(4,881)
Tax effect	492		1,068
Other comprehensive income (loss), net of tax	(2,213)		(3,813)
Comprehensive earnings (loss)	49,940	30,379	197,625	147,273
Recurring [Member]
Revenues
Total revenues	328,150	251,306	987,848	756,665
Implementation and Other [Member]
Revenues
Total revenues	$ 6,017	$ 4,888	$ 16,762	$ 13,873