Income Taxes (Income Tax Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current income tax expense	$ 38,675	$ 36,002	$ 48,256
Deferred income tax expense (benefit)	7,784	(15,832)	7,614
Income tax expense, as reported	$ 46,459	$ 20,170	$ 55,870
Effective tax rate	9.50%	5.70%	11.20%