Income Taxes (Income Tax Expense from Continuing Operations) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 28,520	$ 11,024	$ 16,398
State	2,285	1,825	1,048
Total Current	30,805	12,849	17,446
Deferred
Federal	477	2,323	(2,393)
State	(77)	(729)	(89)
Foreign	201	4	(205)
Total Deferred	601	1,598	(2,687)
Income tax expense	$ 31,406	$ 14,447	$ 14,759