Aircraft and Aircraft Engines Held for Lease or Sale (Details)	1 Months Ended		12 Months Ended
	Feb. 29, 2016 Aircraft	Jan. 31, 2016 USD ($) Aircraft	Dec. 31, 2015 USD ($) Aircraft Engine Asset Airframe	Dec. 31, 2014 USD ($) Aircraft Asset
Aircraft and aircraft engines held for lease or sale [Abstract]
Proceeds from the sale of airframe parts | $			$ 3,616,400	$ 312,100
Turboprop Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number owned			16	25
Percentage of net book value			45.00%	52.00%
Turboprop Aircraft [Member] | Subsequent Event [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Gain (loss) on sale of aircraft and parts from an engine | $		$ 19,000
Number of aircraft sold		1
Regional Jet Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number owned			8	8
Percentage of net book value			49.00%	43.00%
Regional Jet Aircraft [Member] | Subsequent Event [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of aircraft sold	2
Engines [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number owned			5	5
Percentage of net book value			6.00%	5.00%
Held for Lease [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Percentage of net book value			5.00%
Payment for equipment and acquisition costs related to aircraft purchased | $			$ 1,333,700	$ 74,529,000
Number of assets lease term extended | Asset			6
Number of off leased assets leased | Asset				2
Held for Lease [Member] | Turboprop Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Gain (loss) on sale of aircraft and parts from an engine | $			$ 5,713,600
Number of aircraft sold			2
Number of aircraft or engines subject to lease | Engine			3
Held for Lease [Member] | Engines [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of aircraft or engines subject to lease | Engine			3
Held for Lease [Member] | Turboprop Aircraft and Engines [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Gain (loss) on sale of aircraft and parts from an engine | $				$ 3,147,200
Number of aircraft sold				9
Held for Sale [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Proceeds from the sale of airframe parts | $			$ 313,800	$ 312,100
Held for Sale [Member] | Turboprop Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of aircraft sold			1
Number of airframes sold for parts | Airframe			3
Held for Sale [Member] | Regional Jet Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of aircraft sold			4
Held for Sale [Member] | Regional Jet Aircraft [Member] | Subsequent Event [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of aircraft sold	2
Held for Sale [Member] | Turboprop Aircraft and Regional Jet Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Gain (loss) on sale of aircraft and parts from an engine | $				$ 1,077,100