Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Net operating loss carryforwards	$ 18,826	$ 20,347
Tax credits	19,316	40,188
Compensation	17,133	18,731
Deferred revenue	16,333	19,169
Operating lease	10,236	10,162
Other	9,988	9,051
Gross deferred income tax assets	91,832	117,648
Less: valuation allowance	(11,324)	(10,112)
Net deferred income tax assets	80,508	107,536
Deferred income tax liabilities:
Depreciation and amortization	(41,465)	(48,967)
Operating lease right-of-use asset	(8,791)	(7,650)
Deferred revenue	(15,596)	(33,947)
Total deferred income tax liabilities	(65,852)	(90,564)
Net deferred income taxes	14,656	16,972
Deferred income taxes / liabilities included in the balance sheet are:
Deferred income tax asset – noncurrent	50,778	57,476
Deferred income tax liability – noncurrent	(36,122)	(40,504)
Net deferred income taxes	$ 14,656	$ 16,972