Income Taxes (Provision for Income Taxes) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Current Federal Tax Expense (Benefit)	$ 3,750	$ 2,169	$ 31,338
Current State and Local Tax Expense (Benefit)	2,141	1,029	2,843
Current Foreign Tax Expense (Benefit)	1,677	(4,107)	529
Current Income Tax Expense (Benefit)	7,568	(909)	34,710
Deferred Federal Income Tax Expense (Benefit)	(11,062)	11,497	36,911
Deferred State and Local Income Tax Expense (Benefit)	445	1,313	2,591
Deferred Foreign Income Tax Expense (Benefit)	0	1,036	(386)
Deferred Income Tax Expense (Benefit)	(10,617)	13,846	39,116
Income Tax Expense (Benefit)	$ (3,049)	$ 12,937	$ 73,826