Accounting For Income Taxes (Schedule Of Components 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]
Taxes currently provided	$ 39,698	$ 19,812	$ 32,625
Deferred income tax expense	23,532	21,449	24,007
Total income tax expense	$ 63,230	$ 41,261	$ 56,632