Income Taxes (Income Tax Expense (Benefit)) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense
Federal	$ 7,441	$ 10,952
State and local	2,126	2,656
Total current income tax expense	9,567	13,608
Deferred income tax (benefit) expense
Federal	(21,799)	6,999
State and local	(7,017)	1,656
Total deferred tax (benefit) expense	(28,816)	8,655
Net income tax (benefit) expense	$ (19,249)	$ 22,263