Maintenance Reserves and Accrued Maintenance Costs (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012 Lease	Dec. 31, 2013	Dec. 31, 2011
Maintenance Reserves and Accrued Maintenance Costs [Abstract]
Proceeds from lease payments included in refundable maintenance reserves		$ 6,528,500
Maintenance revenue, aircraft returned	6,528,500
Number of aircraft leases assigned to new lessee		2
Refundable maintenance reserves		14,477,400	10,480,000
Accrued maintenance costs		878,700	2,774,100	1,013,400
Total		$ 15,356,100	$ 13,254,100