Mortgage Servicing Rights (Schedule of Servicing Assets at Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Mortgage Servicing Rights [Abstract]
Cost of mortgage servicing rights: Beginning balance	$ 458	$ 730
Cost of mortgage servicing rights: Amortization	(74)	(54)
Cost of mortgage servicing rights: Ending balance	384	676
Valuation allowance: Beginning balance	(223)	(362)
Valuation allowance: Valuation reversals	24	61
Valuation allowance: Ending balance	(199)	(301)
Mortgage servicing rights cost	384	676
Valuation allowance	(199)	(301)
Carrying value	185	375
Fair value	$ 185	$ 375	$ 235

Amortized carrying amount (balance) as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 5: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

- Definition

Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References+ Details

- Definition

Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss.

+ References+ Details