Aircraft and Aircraft Engines Held for Lease or Sale (Details) (USD $)	0 Months Ended	3 Months Ended			9 Months Ended		3 Months Ended												3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		9 Months Ended			9 Months Ended				12 Months Ended					3 Months Ended
	Oct. 31, 2014	Sep. 30, 2014 Asset Aircraft	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Aircraft	Sep. 30, 2013	Sep. 30, 2014 Held-for-sale [Member]	Sep. 30, 2013 Held-for-sale [Member]	Sep. 30, 2014 Bombardier Dash-8-300 [Member] Aircraft	Dec. 31, 2013 Bombardier Dash-8-300 [Member] Aircraft	Sep. 30, 2014 Bombardier CRJ-700 [Member] Aircraft	Dec. 31, 2013 Bombardier CRJ-700 [Member] Aircraft	Sep. 30, 2014 Bombardier Dash-8-Q400 [Member] Aircraft	Dec. 31, 2013 Bombardier Dash-8-Q400 [Member] Aircraft	Sep. 30, 2014 Bombardier CRJ-705 [Member] Aircraft	Dec. 31, 2013 Bombardier CRJ-705 [Member] Aircraft	Sep. 30, 2014 Saab 340B Plus [Member] Aircraft	Dec. 31, 2013 Saab 340B Plus [Member] Aircraft	Sep. 30, 2014 Fokker 50 [Member] Aircraft	Sep. 30, 2014 Fokker 50 [Member] Aircraft	Dec. 31, 2013 Fokker 50 [Member] Aircraft	Sep. 30, 2014 Fokker 100 [Member] Aircraft	Jun. 30, 2014 Fokker 100 [Member] Aircraft	Sep. 30, 2014 Fokker 100 [Member] Aircraft	Dec. 31, 2013 Fokker 100 [Member] Aircraft	Sep. 30, 2014 Fokker 100 [Member] Held-for-Leases [Member] Aircraft	Sep. 30, 2014 General Electric CF34-8E5 engine [Member] Aircraft	Dec. 31, 2013 General Electric CF34-8E5 engine [Member] Aircraft	Sep. 30, 2014 Saab 340B [Member] Aircraft	Dec. 31, 2013 Saab 340B [Member] Aircraft	Sep. 30, 2014 Tay 650-15 engine [Member] Aircraft	Dec. 31, 2013 Tay 650-15 engine [Member] Aircraft	Dec. 31, 2013 General Electric CT7-9B engine [Member] Aircraft	Sep. 30, 2014 General Electric CT7-9B engine [Member] Aircraft	Sep. 30, 2014 Saab 340 A [Member] Aircraft	Dec. 31, 2013 Saab 340 A [Member] Aircraft	Sep. 30, 2014 ATR 42-600 [Member] Aircraft	Sep. 30, 2014 Fokker 50 & Bombardier Dash-8-300 [Member]	Sep. 30, 2013 deHavilland DHC-6 and Fokker 50 aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number owned									8	9	3	0	3	3	1	1	6	6	6	6	10	2		2	7		2	3	1	4	1	1	2	2	1	1	1
Percentage of net book value (in hundredths)									20.00%	23.00%	19.00%	0.00%	16.00%	17.00%	11.00%	12.00%	7.00%	8.00%	6.00%	6.00%	10.00%	3.00%		3.00%	19.00%		4.00%	6.00%	1.00%	4.00%	1.00%	1.00%	0.00%	1.00%	0.00%	0.00%	11.00%
Number of aircraft or engines subject to lease																																	2
Impairment charges		$ 11,718,700	$ 6,800,000	$ 0	$ 18,518,700	$ 0														$ 333,400		$ 8,478,900	$ 6,800,000	$ 11,385,300		$ 2,906,400
Number of aircraft on impairment recorded																				1		5	5	7		2
Number of aircraft held for sale																			1	1		5		5
Payment for equipment and acquisition costs related to aircraft purchased		15,020,600		2,545,400
Gain on sale of aircraft and parts from an engine	192,000																																					1,809,400	1,985,200
Number of aircraft sold									1										2
Number of assets lease term extended		3
Number of entity aircraft off lease		11			11																	1		1			2		5		1			2
Re-lease opportunities for the off-lease aircraft (in hundredths)		14.00%			14.00%
Number of aircrafts letter of intent for lease signed																								5					2
Proceeds from the sale of airframe parts					$ 273,800	$ 73,600	$ 48,100	$ 73,600