Income Taxes - Additional Information (10K Only) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 22, 2017
Income Tax Disclosure [Abstract]
Measurement period adjustment, change in tax rate, income tax benefit			$ 3,576
Measurement period adjustment, transition tax for accumulated foreign earnings, income tax expense			5,026
Additional U.S. tax act- transition tax		$ 1,661
U.S. tax act - transition tax	$ 20,434	20,434
Unremitted foreign earnings	$ 738,000			$ 495,000
Income tax holiday term	10 years
Income tax holiday, percent	1.50%
Income tax holiday, aggregate dollar amount	$ 700
Payments for income taxes net of refunds	42,933	10,244	$ 19,763
Operating Loss Carryforwards [Line Items]
Valuation allowances	35,145	27,270
Recognition of unrecognized tax benefit upon which the effective rate would change	12,890
Unrecognized tax benefit that would impact effective tax rate	11,532
Interest on income tax expense (benefit)		1,262
Unrecognized tax benefits interest on income taxes accrued	1,366	$ 1,353
United States
Operating Loss Carryforwards [Line Items]
Tax loss carryforward domestic	6,608
Foreign
Operating Loss Carryforwards [Line Items]
Tax loss carryforward domestic	$ 90,531