Subsequent Events - Additional Information (Detail) - Subsequent Event	Apr. 23, 2017 BusinessUnit
Subsequent Event [Line Items]
Number of new organizational structure business units established	2
Full implementation expected period	2018

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