Loans Receivable (Details 5) (Commercial loans, USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2013	Dec. 31, 2012
Additional information regarding impaired loans
Recorded Investment In Impaired Loans Without a Related Allowance	$ 1,869	$ 2,159
Recorded Investment In Impaired Loans With a Related Allowance		2,970
Recorded Investment In Total Impaired Loans	1,869	5,129
Unpaid Principal Balance	3,817	7,027
Related Valuation Allowance		1,083
Average Impaired Loans for the Period	3,474	6,984
Other
Additional information regarding impaired loans
Recorded Investment In Impaired Loans Without a Related Allowance	1,869	2,159
Recorded Investment In Impaired Loans With a Related Allowance		2,970
Recorded Investment In Total Impaired Loans	1,869	5,129
Unpaid Principal Balance	3,817	7,027
Related Valuation Allowance		1,083
Average Impaired Loans for the Period	$ 3,474	$ 6,984

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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Amount of allowance for credit losses related to recorded investment.

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

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Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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