Organization and Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equipment Held for Operating Lease
Impairment charges	$ 5,874	$ 3,341	$ 2,874
Minimum
Equipment Held for Operating Lease
Estimated useful life	3 years
Maximum
Equipment Held for Operating Lease
Estimated useful life	5 years
Equipment held for lease | Engines and related equipment
Equipment Held for Operating Lease
Estimated useful life	15 years
Residual value (as a percent)	55.00%
Equipment held for lease | Spare part packages
Equipment Held for Operating Lease
Estimated useful life	15 years
Residual value (as a percent)	25.00%
Equipment held for lease | Aircraft | Minimum
Equipment Held for Operating Lease
Estimated useful life	13 years
Residual value (as a percent)	15.00%
Equipment held for lease | Aircraft | Maximum
Equipment Held for Operating Lease
Estimated useful life	20 years
Residual value (as a percent)	17.00%
Equipment held for lease | Engines and aircraft
Equipment Held for Operating Lease
Impairment charges		$ 1,000	$ 200