FHLB Advances and Other Borrowings - FHLB Advances and Other Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB Advances	$ 2,935	$ 3,303
Total FHLB Advances	$ 2,935	$ 3,303

Carrying amount of Federal Home Loan Bank (FHLB) loans (advances) to member financial institutions.

No definition available.

Name:	us-gaap_FederalHomeLoanBankAdvances
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant