Related Party and Similar Transactions (Details) (J.T. Power, USD $)	12 Months Ended		0 Months Ended		3 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended				0 Months Ended
	Dec. 31, 2008 item	Mar. 31, 2013	Mar. 07, 2012 Consignment agreement with guarantee item	Feb. 22, 2012 Consignment agreement with guarantee	Mar. 31, 2013 Consignment agreement with guarantee	Mar. 31, 2012 Consignment agreement with guarantee	Dec. 31, 2008 Consignment agreement with guarantee item	Jul. 31, 2009 Consignment agreement without guarantee item	Mar. 31, 2013 Consignment agreement without guarantee	Mar. 31, 2012 Consignment agreement without guarantee	Mar. 31, 2013 Aircraft Engine Agency Agreement	Mar. 31, 2012 Aircraft Engine Agency Agreement	Feb. 22, 2012 Minimum Consignment agreement with guarantee
Related Party and Similar Transactions
Number of consignment agreements with related party	2
Book value of engines consigned for sale upon teardown of engine parts							$ 5,200,000	$ 23,000
Sales of consigned parts by related party					8,800	1,400			400	44,800
Net consignment proceeds from related party													4,000,000
Consignment proceeds obligation from related party				1,300,000
Required quarterly consignment payments by related party			45,000
Payment term of consignment proceeds by related party			5 years
Interest rate on payment of consignment proceeds by related party (as a percent)			6.00%
Number of quarterly consignment payments which can be skipped by related party			1
Interest rate for skipped payment (as a percent)			12.00%
Principal amount owing under the note		1,200,000
Number of engines consigned for sale upon teardown of engine parts							4	1
Lease rent revenue											$ 0	$ 0