Income Taxes From Continuing Operations (Schedule of Components of Income Tax Expense Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current U.S. federal tax expense	$ 89,996	$ 69,117	$ 38,876
Current state and local tax expense	10,658	12,294	10,104
Current foreign tax expense (benefit)	469	415	(424)
Total current income tax expense	101,123	81,826	48,556
Deferred federal income tax benefit	(27,641)	(16,232)	(3,642)
Deferred state and local Income tax expense (benefit)	380	427	(5,653)
Deferred foreign income tax expense (benefit)	(243)	143	449
Total deferred income tax benefit	(27,504)	(15,662)	(8,846)
Income Tax Expense	$ 73,619	$ 66,164	$ 39,710