Federal Home Loan Bank Advances (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Outstanding Balance [Abstract]
Less than 1 year	$ 0	$ 22,000,000
2-3 years	10,000,000	0
3-4 years	0	10,000,000
4 -5 years	70,000,000	0
5-10 years	0	70,000,000
Total Federal Home Loan Bank Advances	80,000,000	102,000,000
Weighted Rate [Abstract]
Less than 1 year	0.00%	2.90%
2-3 years	4.53%	0.00%
3-4 years	0.00%	4.53%
4-5 years	3.37%	0.00%
5-10 years	0.00%	3.37%
Total Federal Home Loan Bank Advances	3.52%	3.38%
Collateral pledged	33,700,000
Des Moines [Member]
Federal Home Loan Bank, Advances, Branch of FHLB [Line Items]
Carrying value of the loans pledged	442,200,000	469,000,000
Availability under the secured line of credit	164,000,000
Investment in capital stock	7,600,000
San Francisco [Member]
Federal Home Loan Bank, Advances, Branch of FHLB [Line Items]
Investment in capital stock	$ 1,300,000

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

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Describes the weighted average interest rate applicable to the specific advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Amount of federal home loan bank advances. Advances are loans from the federal home loan bank system to a member (shareholder).

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due after five years of the Balance Sheet date.

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from four to five years of the Balance Sheet date.

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due within one year of the Balance Sheet date.

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from three to four years of the Balance Sheet date.

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from two to three years of the Balance Sheet date.

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Amount of federal home loan bank advances maturing after the fifth fiscal year following the latest fiscal year.

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Amount of federal home loan bank advances maturing in the fifth fiscal year following the latest fiscal year.

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Amount of federal home loan bank advances maturing in the fourth fiscal year following the latest fiscal year.

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Amount of federal home loan bank advances maturing in the third fiscal year following the latest fiscal year.

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Amount of federal home loan bank advances maturing in the next fiscal year following the latest fiscal year.

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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