Income Taxes - Reconciliation of Federal Statutory Rate to Effective Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Rate Reconciliation [Line Items]
Income before income taxes	$ 153,543	$ 59,217	$ 26,151
Expected tax at statutory rate	32,247	12,436	5,492
Adjustments due to:
Difference between U.S. and foreign tax	530	618	436
State income and franchise tax	1,462	133	(179)
Business tax credits	(2,239)	(4,660)	(2,746)
Stock-based compensation expense	(9,049)	(9,243)	(1,877)
U.S. taxation of foreign earnings	30	51	3,096
Foreign-derived intangible income	(2,547)		(869)
Executive compensation	3,397	1,401	841
Other	1,930	896	92
Change in U.S. and foreign tax rates	32	(2,650)	(193)
Uncertain tax provisions	(443)	(168)	1,069
Change in valuation allowance	(48)	(12)	(125)
Return to provision adjustments	(50)	(89)	(79)
Other	(0)	578	(218)
Total	$ 25,252	$ (709)	$ 4,740
Expected tax at statutory rate	21.00%	21.00%	21.00%
Adjustments due to:
Difference between U.S. and foreign tax	0.30%	1.00%	1.70%
State income and franchise tax	1.00%	0.20%	(0.70%)
Business tax credits	(1.50%)	(7.90%)	(10.50%)
Stock-based compensation expense	(5.90%)	(15.60%)	(7.20%)
U.S. taxation of foreign earnings	0.00%	0.10%	11.80%
Executive compensation	2.20%	2.40%	3.20%
Other	1.30%	1.50%	0.40%
Change in U.S. and foreign tax rates	0.00%	(4.50%)	(0.70%)
Uncertain tax provisions	(0.30%)	(0.30%)	4.10%
Foreign-derived intangible income	(1.70%)	0.00%	(3.30%)
Change in valuation allowance	(0.00%)	(0.00%)	(0.50%)
Return to provision adjustments	(0.00%)	(0.20%)	(0.30%)
Other	(0.00%)	1.00%	(0.90%)
Income tax (benefit) provision	16.40%	(1.20%)	18.10%