Flight Equipment Held For Sale (Details) - item	3 Months Ended
Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Number of aircraft held for sale		6	5
Number of engines held for sale		4
Number of aircraft sold	5

The number of aircraft sold by the entity during the period.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentNumberOfAircraftSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration