Income Taxes (Schedule of Provisions of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Income Tax Expense (Benefit), Continuing Operations
Federal	$ 22,297	$ 62,274	$ 61,073
State and local	6,416	10,720	10,560
Foreign	1,214	158	466
Total current provision	29,927	73,152	72,099
Deferred Income Tax Expense (Benefit), Continuing Operations
Federal	12,478	7,614	(2,506)
State and local	1,639	(806)	(110)
Foreign	(243)	0	18
Total deferred provision	13,874	6,808	(2,598)
Provision for income taxes	$ 43,801	$ 79,960	$ 69,501