Fair Value Measurements - Interest Rate Swaps (Details)	3 Months Ended
Sep. 30, 2015 aircraft
Interest Rate Swap [Member]
Derivative [Line Items]
Number of aircraft delivered, subject to interest rate swaps	3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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