Subsequent Event (Details) - Note payable at a fixed interest rate of 2.25%, maturing in January 2018, secured by engines - engine		12 Months Ended
Jan. 10, 2014	Dec. 31, 2015
Subsequent events
Number of engines pledged as collateral	3
LIBOR
Subsequent events
Basis spread on variable rate (as a percent)		2.25%

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration