Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Carrying Value	$ 23,484	$ 25,051
Residential loans held for sale	2,761	2,993
Impaired loans	32,170	18,355
Foreclosed real estate and other repossessed assets	735	873
Mortgage-servicing rights	(323)	(114)	(96)
Us Government Agencies Debt Securities [Member]
Carrying Value	1,029	1,068
Mortgage-Backed Securities, Issued By Us Government Sponsored Enterprises [Member]
Carrying Value	13,960	14,763
Collateralized Mortgage Backed Securities [Member]
Carrying Value	985	1,721
Mortgage-Backed Securities, Issued By Private Enterprises [Member]
Carrying Value	294	255
Auction-Rate Trust Preferred Securities [Member]
Carrying Value	7,216	7,244
Mortgage Servicing Rights [Member]
Mortgage-servicing rights	1,633	726
Fair Value, Inputs, Level 1 [Member] \| Mortgage Servicing Rights [Member]
Mortgage-servicing rights	0	0
Fair Value, Inputs, Level 2 [Member] \| Mortgage Servicing Rights [Member]
Mortgage-servicing rights	0	0
Fair Value, Inputs, Level 3 [Member] \| Mortgage Servicing Rights [Member]
Mortgage-servicing rights	1,633	726
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Residential loans held for sale	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Us Government Agencies Debt Securities [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Mortgage-Backed Securities, Issued By Us Government Sponsored Enterprises [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Collateralized Mortgage Backed Securities [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Mortgage-Backed Securities, Issued By Private Enterprises [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Auction-Rate Trust Preferred Securities [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Residential loans held for sale	2,761	2,993
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Us Government Agencies Debt Securities [Member]
Carrying Value	1,029	1,068
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Mortgage-Backed Securities, Issued By Us Government Sponsored Enterprises [Member]
Carrying Value	13,960	14,763
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Collateralized Mortgage Backed Securities [Member]
Carrying Value	985	1,721
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Mortgage-Backed Securities, Issued By Private Enterprises [Member]
Carrying Value	294	255
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Auction-Rate Trust Preferred Securities [Member]
Carrying Value	7,216	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Residential loans held for sale	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Us Government Agencies Debt Securities [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Mortgage-Backed Securities, Issued By Us Government Sponsored Enterprises [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Collateralized Mortgage Backed Securities [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Mortgage-Backed Securities, Issued By Private Enterprises [Member]
Carrying Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Auction-Rate Trust Preferred Securities [Member]
Carrying Value	0	7,244
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Foreclosed real estate and other repossessed assets	0	0
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Foreclosed real estate and other repossessed assets	0	0
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Impaired loans	32,170	18,355
Foreclosed real estate and other repossessed assets	$ 735	$ 873

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References+ Details

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15D

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph b

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 14

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Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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+ Details

- Definition

Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts.

+ References+ Details

- Definition

Carrying amount of mortgage loans to individuals not classified as held for investment but are held-for-sale.

+ References+ Details