CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues	$ 556,921	$ 499,319	$ 1,609,054	$ 1,437,349
Cost of revenues	108,364	92,597	304,814	270,911
Gross profit	448,557	406,722	1,304,240	1,166,438
Operating expenses:
Selling and marketing (excluding customer base amortization)	185,395	180,055	510,736	483,354
Software development	56,912	53,143	162,520	148,500
General and administrative	91,270	64,671	246,576	186,747
Customer base amortization	29,651	19,121	60,621	55,885
Total operating expenses	363,228	316,990	980,453	874,486
Income from operations	85,329	89,732	323,787	291,952
Interest income (expense), net	10,656	(7,943)	(461)	(23,698)
Other income, net	1,389	1,546	3,596	2,343
Income before income taxes	97,374	83,335	326,922	270,597
Income tax expense	25,084	19,031	81,841	70,933
Net income	$ 72,290	$ 64,304	$ 245,081	$ 199,664
Net income per share - basic (in dollars per share)	$ 0.18	$ 0.16	$ 0.62	$ 0.51
Net income per share - diluted (in dollars per share)	$ 0.18	$ 0.16	$ 0.62	$ 0.51
Weighted-average outstanding shares - basic (in shares)	394,712	392,419	393,650	392,101
Weighted-average outstanding shares - diluted (in shares)	396,209	394,295	394,973	394,036