Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] - Bank Of America [Member] $ in Thousands	Oct. 28, 2015 USD ($) Branches
Subsequent Event [Line Items]
Number of branches \| Branches	3
Loans	$ 400
Deposits	$ 245,000
Percentage of premium on deposits	1.91%

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