Company's Deferred Tax Assets, Net of Deferred Tax Liabilities and Valuation Allowance (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Deferred tax assets, net of deferred tax liabilities	$ 117,805	$ (449)
Valuation allowance	(1,345)	(1,259)
Deferred tax assets, net of deferred tax liabilities and valuation allowance	$ 116,460
Deferred tax assets, net of deferred tax liabilities and valuation allowance		$ (1,708)