Income Taxes (Schedule Of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal current	$ 55,227	$ 69,590	$ 6,275
State current	6,616	10,088	6,664
Foreign current	1,472	(478)	1,347
Current income tax expense (benefit), total	63,315	79,200	14,286
Federal deferred	(9,668)	(8,630)	50,297
State deferred	1,279	(438)	7,566
Deferred income tax expense (benefit), total	(8,389)	(9,068)	57,863
Total income tax expense	$ 54,926	$ 70,132	$ 72,149