Aircraft and Aircraft Engines Held for Lease or Sale (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended						6 Months Ended						3 Months Ended	6 Months Ended										3 Months Ended	12 Months Ended			3 Months Ended
	Jun. 30, 2014 Asset Aircraft	Jun. 30, 2013	Jun. 30, 2014 Aircraft	Jun. 30, 2013	Jun. 30, 2014 Held-for-sale [Member]	Jun. 30, 2013 Held-for-sale [Member]	Jun. 30, 2014 Bombardier Dash-8-300 [Member] Aircraft	Dec. 31, 2013 Bombardier Dash-8-300 [Member] Aircraft	Jun. 30, 2014 Bombardier CRJ-700 [Member] Aircraft	Dec. 31, 2013 Bombardier CRJ-700 [Member] Aircraft	Jun. 30, 2014 Fokker 100 [Member] Aircraft	Dec. 31, 2013 Fokker 100 [Member] Aircraft	Jun. 30, 2014 Bombardier Dash-8-Q400 [Member] Aircraft	Dec. 31, 2013 Bombardier Dash-8-Q400 [Member] Aircraft	Jun. 30, 2014 Bombardier CRJ-705 [Member] Aircraft	Dec. 31, 2013 Bombardier CRJ-705 [Member] Aircraft	Jun. 30, 2014 Saab 340B Plus [Member] Asset Aircraft	Jun. 30, 2014 Saab 340B Plus [Member] Aircraft	Dec. 31, 2013 Saab 340B Plus [Member] Aircraft	Jun. 30, 2014 Fokker 50 [Member] Aircraft	Dec. 31, 2013 Fokker 50 [Member] Aircraft	Jun. 30, 2014 General Electric CF34-8E5 engine [Member] Aircraft	Dec. 31, 2013 General Electric CF34-8E5 engine [Member] Aircraft	Jun. 30, 2014 Saab 340B [Member] Aircraft	Dec. 31, 2013 Saab 340B [Member] Aircraft	Jun. 30, 2014 Tay 650-15 engine [Member] Aircraft	Dec. 31, 2013 Tay 650-15 engine [Member] Aircraft	Jun. 30, 2014 General Electric CT7-9B engine [Member] Asset Aircraft	Dec. 31, 2013 General Electric CT7-9B engine [Member] Aircraft	Jun. 30, 2014 Saab 340 A [Member] Aircraft	Dec. 31, 2013 Saab 340 A [Member] Aircraft	Jun. 30, 2014 Saab 340B and General Electric CF34-8E5 [Member] Aircraft	Jun. 30, 2013 Dash-8-100 [Member]	Jun. 30, 2014 Dash-8-100 [Member] Aircraft	Jun. 30, 2013 General Electric CF7-9B engine [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number owned							9	9	3	0	7	7	3	3	1	1	6	6	6	9	10	2	3	1	4	1	1	2	2	1	1
Percentage of net book value (in hundredths)							21.00%	23.00%	18.00%	0.00%	13.00%	19.00%	15.00%	17.00%	10.00%	12.00%	8.00%	8.00%	8.00%	8.00%	10.00%	4.00%	6.00%	1.00%	4.00%	1.00%	1.00%	1.00%	0.00%	0.00%	0.00%
Number of aircraft or engines subject to lease																													2
Impairment charges	$ 6,800,000	$ 0	$ 6,800,000	$ 0							$ 6,800,000
Number of aircraft on impairment recorded											5
Payment for equipment and acquisition costs related to aircraft purchased	9,000	2,323,000
Gain on sale of aircraft and parts from an engine																																762,500	1,871,000
Number of aircraft sold																																3
Gain on financial lease																																			73,300
Number of assets lease term extended	5
Number of aircraft and engines returned by customers																	6											2
Number of entity aircraft off lease	21		21								6						6	6		3		2				1		2						1
Re-lease opportunities for the off-lease aircraft (in hundredths)	31.00%		31.00%
Number of aircrafts letter of intent for lease signed																		2
Number of aircrafts deposit for lease signed																		1
Expected numbers of aircraft to deliver			4
Proceeds from the sale of airframe parts			$ 225,800	$ 207,700	$ 10,500	$ 171,000