Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] $ in Millions	1 Months Ended
Oct. 31, 2016 USD ($) Assets
Subsequent Event [Line Items]
Aggregate sale price of wholly owned operating assets \| $	$ 483.5
Number of operating assets sold \| Assets	18

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.

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