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Commitments and Contingencies Disclosure - Commitments and Contingencies (Schedule of Capital Leased Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]    
Capital Leased Assets, Gross $ 41,336us-gaap_CapitalLeasedAssetsGross $ 48,992us-gaap_CapitalLeasedAssetsGross
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation (26,831)us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation (28,489)us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
Capital Leases, Balance Sheet, Assets by Major Class, Net $ 14,505us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet $ 20,503us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet