Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income	$ 10,878	$ 32,729
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,692	13,730
Amortization of debt issuance costs	1,710	1,727
Non-cash operating lease expense	1,509	1,791
Stock-based compensation expense	61,782	87,202
Change in fair value of contingent consideration	240
Deferred income taxes	(336)	(364)
Loss on abandonment of operating lease assets	0	780
Changes in operating assets and liabilities, net of effects of business acquisitions
Accounts receivable	(4,362)	(12,873)
Prepaid expenses and other assets	(8,439)	(47,241)
Accounts payable	(1,860)	4,917
Accrued expenses and other current liabilities	(2,089)	(1,897)
Operating lease liabilities	(2,156)	(590)
Other liabilities	(400)	500
Net cash provided by operating activities	81,169	80,411
Cash flows from investing activities
Purchase of property and equipment	(3,172)	(3,058)
Acquisitions, net of cash acquired	(156,853)	(125,728)
Capitalized software	(22,977)	(13,630)
Investment in minority equity interest	(15,007)	0
Net cash used in investing activities	(198,009)	(142,416)
Cash flows from financing activities
Payments on long-term debt	(3,515)	(3,515)
Payment for contingent consideration	0	(832)
Repurchases of Class A common stock	(83,765)	0
Proceeds from exercise of stock options	7,839	15,481
Employee taxes paid related to net share settlement of equity awards	(14,288)	(26,017)
Net cash used in financing activities	(93,729)	(14,883)
Net change in cash, cash equivalents and restricted cash	(210,569)	(76,888)
Cash, cash equivalents and restricted cash
Beginning of period	941,109	971,591
End of period	730,540	894,703
Non cash investing and financing activities
Right-of-use assets obtained in exchange for new operating lease liabilities	2,311	471
Stock-based compensation included in capitalized software	$ 3,845	$ 3,418