Subsequent Event - Additional Information (Detail) - Subsequent Event $ in Millions	Aug. 05, 2015 USD ($)
Mr. Cole's Agreement
Subsequent Event [Line Items]
One time pre-tax resignation charge to be recognized	$ 5.0
Mr. Cuneo's Agreement
Subsequent Event [Line Items]
One time pre-tax appointment charge to be recognized	$ 1.2

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