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Mortgage Servicing Rights (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary of mortgage servicing rights capitalized and related amortization
Carrying amount, beginning of year	$ 2,820	$ 3,190
Mortgage servicing rights capitalized during the year	1,981	1,493
Mortgage servicing rights amortization during the year	1,335	744
Net change in valuation allowance	309	(1,119)
Carrying amount, end of year	3,775	2,820
Valuation allowance:
Beginning of year	1,119
Additions		1,119
Reduction	(309)
End of year	810	1,119
Fair Value, beginning of period	2,820	3,264
Fair Value, end of period	$ 4,329	$ 2,820

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Capitalized mortgage servicing rights Msrs.

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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.

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Fair value of the servicing asset that has been amortized as of the balance sheet date.

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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.

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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.

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The net increase (decrease) in the valuation allowance for servicing assets subsequently measured using the amortization method.

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New provisions recoveries or charged against this account which increase or reduce the net value of servicing assets.

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Reduction in valuation allowance of servicing assets based on sales and disposals.

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