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Investments (Components Of Investments) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Schedule of Equity Method Investments [Line Items] |  |  |
Equity investment in unconsolidated joint venture |  | $ 118,783 | $ 114,711
Other investments at cost |  | 6 | 6
Undistributed earnings of investments |  | $ 38,400 | $ 34,400
Maximum [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity investment, ownership percentage |  | 50.00% | 50.00%
AerDragon [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity investment in unconsolidated joint venture | [1] | $ 60,124 | $ 55,430
Equity investment, ownership percentage | [1] | 17.00% |
AerLift [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity investment in unconsolidated joint venture |  | $ 45,087 | 47,352
Equity investment, ownership percentage |  | 39.00% |
ACSAL [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity investment in unconsolidated joint venture | [1] | $ 13,566 | $ 11,923
Equity investment, ownership percentage | [1] | 19.00% |
[1] | AerDragon and ACSAL are VIEs for which we are not the PB but do have significant influence. Therefore, they are accounted for under the equity method.

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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594 + Details
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