INCOME TAXES - Variation of Provision for Income Taxes from Statutory U.S. Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income taxes computed at the statutory U.S. federal income tax rate	$ 85,486	$ 52,949	$ 61,543
State income taxes, net of federal tax benefit	5,012	7,133	6,326
Tax liabilities (no longer required) required	(5,110)	(2,002)	1,908
Valuation allowance	1,323	1,699	240
Tax credit refunds, net	(1,669)	(3,493)	(3,415)
Foreign earnings taxed at other than 21%	12,197	3,741	7,851
Deferred tax rate changes	(717)	92	(1,947)
Other	1,834	(1,797)	(3,199)
Provision (benefit) for income taxes	$ 98,356	$ 58,322	$ 69,307
Effective tax rate	24.20%	23.10%	23.60%