Income Taxes (Schedule Of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Liabilities, Net, Classification [Abstract]
Gross assets	$ 2,458	$ 2,012
Gross liabilities	(4,111)	0
Current deferred income tax assets and liabilities	(1,653)	2,012
Valuation allowance	0	0
Current deferred income taxes	(1,653)	2,012
Gross assets	69,483	63,129
Gross liabilities	(121,317)	(149,708)
Long term deferred income tax assets and liabilities	(51,834)	(86,579)
Valuation allowance	(14,738)	(6,879)
Long term deferred income taxes	(66,572)	(93,458)
Net deferred income tax liability	$ (68,225)	$ (91,446)