Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Income Tax Assets	$ 36,604	$ 36,278
Deferred tax liabilities - non-current	(30,726)	(19,254)
Total net deferred tax assets	5,878	17,024
Deferred tax assets:
Net operating losses	25,260	32,394
Accrued liabilities	30,605	24,452
Deferred compensation	18,906	15,052
Accrued compensation	7,888	7,239
Deferred revenue	15,210	13,219
Tax credits	3,834	5,223
Equity awards	3,402	4,894
Depreciation	3,069	15,424
Operating lease liability	14,889	13,140
Other, net	777	1,817
Valuation allowance	(21,012)	(22,786)
Total deferred tax assets	102,828	110,068
Deferred tax liabilities:
Intangible assets	(21,885)	(24,097)
Capitalized transaction costs	(16,165)	(16,797)
Accounting method change	(4,667)	(7,019)
Prepaid expenses and other	(39,925)	(32,493)
Lease right-of-use assets	(14,308)	(12,638)
Total deferred tax liabilities	$ (96,950)	$ (93,044)