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Maintenance Rights Intangible And Lease Premium, Net (Summary Of Details Of Lease Premiums And Related Accumulated Amortization) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 400,000 | $ 416,465
Accumulated amortization | (82,012) | (52,328)
Finite-lived intangible assets | 317,988 | 364,137
Lease Premium [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 94,959 | 107,140
Accumulated amortization | (44,068) | (36,413)
Finite-lived intangible assets | $ 50,891 | $ 70,727

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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