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Federal Home Loan Bank Advances - Schedule of Federal Home Loan Advances Pledged by Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	$ 24,077	$ 28,883
Single-family mortgage loans [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	9,917	11,141
Multi-family mortgage loans [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	4,968	4,222
Commercial Real Estate [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	1,185	3,384
Securities [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	4,707	9,336
Cash [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Collateralized advances	$ 3,300	$ 800

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- Definition

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

+ References

No definition available.

+ Details

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Period Type:	instant

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- Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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