Unaudited Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Total revenues	$ 353,519	$ 272,198
Cost of revenues
Operating expenses	38,492	29,073
Depreciation and amortization	9,992	7,200
Total cost of revenues	48,484	36,273
Administrative expenses
Sales and marketing	74,996	62,761
Research and development	31,605	24,711
General and administrative	60,504	46,191
Depreciation and amortization	11,663	7,716
Total administrative expenses	178,768	141,379
Total operating expenses	227,252	177,652
Operating income	126,267	94,546
Interest expense	(215)
Other income (expense), net	1,412	629
Income before income taxes	127,464	95,175
Provision for income taxes	35,534	30,559
Net income	$ 91,930	$ 64,616
Earnings per share, basic	$ 1.58	$ 1.12
Earnings per share, diluted	$ 1.58	$ 1.11
Weighted average shares outstanding:
Basic	58,014	57,740
Diluted	58,219	58,394
Comprehensive earnings (loss):
Net income	$ 91,930	$ 64,616
Unrealized net gains (losses) on available-for-sale securities	(1,522)
Tax effect	403
Other comprehensive income (loss), net of tax	(1,119)
Comprehensive earnings (loss)	90,811	64,616
Recurring [Member]
Revenues
Total revenues	348,164	267,774
Implementation and Other [Member]
Revenues
Total revenues	$ 5,355	$ 4,424