Aircraft Portfolio (Details 2) (Aircraft)	Aug. 31, 2012 item	May 31, 2012 item
Owned Through Joint Ventures
Aircraft portfolio
Owned aircraft, number	18	18
Owned Through Joint Ventures | Aircraft Type 767-300 | United Airlines | Lease Expiration Date (FY) 2016 and 2017
Aircraft portfolio
Owned aircraft, number	2
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) 2013
Aircraft portfolio
Owned aircraft, number	12
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) Various
Aircraft portfolio
Owned aircraft, number	16
Number of aircraft for which LOIs for sale have been entered	13
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) 2014
Aircraft portfolio
Owned aircraft, number	4
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1992 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	5
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1993 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	8
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1994 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	2
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1997 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	1
Wholly-Owned
Aircraft portfolio
Owned aircraft, number	2
Wholly-Owned | Aircraft Type 737-300 | Small Planet Airlines | Lease Expiration Date (FY) 2015
Aircraft portfolio
Owned aircraft, number	1
Wholly-Owned | Aircraft Type A320 | Dombassaero Airlines | Lease Expiration Date (FY) 2017
Aircraft portfolio
Owned aircraft, number	1