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Aircraft Portfolio (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2011 | Nov. 30, 2010 | Nov. 30, 2011 aircraft | Nov. 30, 2010 | May 31, 2011
Aircraft Portfolio |  |  |  |  |
Sales from services | $ 160,855 | $ 127,569 | $ 312,247 | $ 250,206 |
Aircraft | Owned Through Joint Ventures |  |  |  |  |
Aircraft Portfolio |  |  |  |  |
Owned aircraft, number |  |  | 20 |  |
Equity investments | 36,228 |  | 36,228 |  |
Membership interest in limited liability companies (as a percent) | 50.00% |  | 50.00% |  |
Sales from services |  |  | 366 | 452 |
Summarized income statement information |  |  |  |  |
Sales | 11,984 | 25,589 | 21,474 | 37,855 |
Income before provision for income taxes | 592 | 5,248 | 1,179 | 5,502 |
Balance sheet information: |  |  |  |  |
Assets | 177,356 |  | 177,356 |  | 219,810
Debt | 93,305 |  | 93,305 |  | 127,037
Members' capital | 80,112 |  | 80,112 |  | 89,375
Aircraft | Wholly-Owned |  |  |  |  |
Aircraft Portfolio |  |  |  |  |
Owned aircraft, number |  |  | 3 |  |
Components of investment in the wholly-owned aircraft, after consideration of financing |  |  |  |  |
Gross carrying value | 27,432 |  | 27,432 |  | 44,586
Debt | (15,966) |  | (15,966) |  | (14,072)
Capital lease obligation |  |  |  |  | (6,716)
Net AAR investment | $ 11,466 |  | $ 11,466 |  | $ 23,798

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