Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2015
Subsequent Event [Line Items]
Proceeds from Recoveries of Loans Previously Charged off	$ 941,000

The cash inflow from loans reinstated and recovered that were previously deemed uncollectible.

No definition available.

Name:	us-gaap_ProceedsFromRecoveriesOfLoanPreviouslyChargedOff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration