Related Party Transactions - Additional Information (Detail) $ in Millions	1 Months Ended
Feb. 28, 2015 USD ($)
Aircraft [Member]
Related Party Transaction [Line Items]
Assets purchase price	$ 9.5

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