Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 110,472	$ 87,240	$ 85,762
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,914	8,946	7,987
Equity-based compensation	43,259	33,355	31,841
Loss (gain) on disposal of equipment	7	21	(429)
Deferred income taxes	(1,912)	1,036	(1,406)
Unrealized foreign currency (gain) loss	(493)	897	(708)
Changes in operating assets and liabilities:
Accounts receivable, net	(16,650)	(6,592)	(1,065)
Other assets	(6,533)	(971)	(8,924)
Accounts payable, accrued and other liabilities	12,256	(3,097)	20,812
Income taxes	(3,667)	1,886	1,180
Deferred revenue	40,530	18,164	11,858
Net cash provided by operating activities	185,183	140,885	146,908
Investing activities:
Purchases of property and equipment	(4,016)	(2,730)	(15,193)
Maturities of short-term investments			1,439
Net cash used in investing activities	(4,016)	(2,730)	(13,754)
Financing activities:
Purchase of common stock	(120,418)	(43,561)	(121,487)
Net cash used in financing activities	(120,418)	(43,561)	(121,487)
Foreign currency impact on cash	(1,748)	(567)	(115)
Net change in cash and cash equivalents	59,001	94,027	11,552
Cash and cash equivalents at beginning of period	204,705	110,678	99,126
Cash and cash equivalents at end of period	263,706	204,705	110,678
Supplemental disclosures of cash flow information:
Cash paid for taxes	$ 29,162	$ 23,766	$ 30,492