Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
U.S. federal, Current	$ 102,191	$ 100,210	$ 113,920
State and local, Current	10,838	10,725	10,328
Current, income tax expense (benefit)	113,029	110,935	124,248
U.S. federal, Deferred	7,984	15,125	(2,720)
State and local, Deferred	1,217	1,109	(116)
Deferred, income tax expense (benefit)	9,201	16,234	(2,836)
U.S. federal, Total	110,175	115,335	111,200
State and local, Total	12,055	11,834	10,212
Total income tax expense	$ 122,230	$ 127,169	$ 121,412