Organization and Summary of Significant Accounting Policies (Fair Value on a Nonrecurring Basis) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) engine aircraft	Mar. 31, 2016 USD ($) engine	Dec. 31, 2016 USD ($)
Assets at fair value and gains (losses) recorded
Equipment held for sale	$ 58,083		$ 30,710
Asset write-down	13,009	$ 2,036
Engine Parts
Assets at fair value and gains (losses) recorded
Number of engines for which impairment is recorded earlier due to part out and sale | engine		1
Asset write-down		$ 2,000
Additional write-down	900
Nonrecurring
Assets at fair value and gains (losses) recorded
Equipment held for lease	11,454
Equipment held for sale	26,306	3,307
Spare parts inventory	2,228
Assets at fair value	39,988	3,307
Total losses on equipment held for lease	(9,019)
Total losses on equipment held for sale	(3,071)	(2,036)
Total losses on spare parts inventory	(919)
Total losses on assets	(13,009)	(2,036)
Nonrecurring | Level 2
Assets at fair value and gains (losses) recorded
Equipment held for lease	11,454
Equipment held for sale	26,306	3,307
Spare parts inventory	2,228
Assets at fair value	$ 39,988	$ 3,307
Engines and related equipment
Assets at fair value and gains (losses) recorded
Number of engines | engine	4
Number of aircraft | aircraft	2
Asset write-down	$ 12,100