Commitments and Contingencies (Aircraft Commitments) (Details) (Capital Addition Purchase Commitments [Member], USD $) In Millions, unless otherwise specified	1 Months Ended		1 Months Ended		1 Months Ended
	Aug. 31, 2010 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member]	Mar. 31, 2013 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] aircrafts	Oct. 31, 2010 Precision Conversions, LLC [Member] Boeing 757 [Member] passengers CargoPalletPositions	Mar. 31, 2013 Precision Conversions, LLC [Member] Boeing 757 [Member]	Aug. 31, 2010 Maximum [Member] M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] aircrafts	Mar. 31, 2013 Completed Modification Process for Standard Freighter Configuration [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts	Mar. 31, 2013 In Freighter Conversion Process [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts	Mar. 31, 2013 In Combi Conversion Process [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts
Long-term Purchase Commitment [Line Items]
Number of aircrafts to be converted					10
Agreement time period	10 years
Number of completed aircraft conversions (in aircrafts)		5				1	1	1
Number of in progress aircraft conversions (in aircrafts)		2
Agreement cancellation fee		$ 2.0		$ 3.7
Number of full cargo pallet positions (in cargo pallet positions)			10
Number of passenger seats (in passengers)			42