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Loan Servicing (Tables) | 12 Months Ended
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Dec. 31, 2012
Loan Servicing [Abstract] |
Originated mortgage servicing rights |
|  | December 31 2012 |  |  | December 31 2011 |  |  | December 31 2010 |
Mortgage servicing rights |  |  |  |  |  |  |  |  |  |  |  |
Balances, January 1 |  | $ | 5,049 |  |  | $ | 4,175 |  |  | $ | 3,010 |
Servicing rights capitalized |  |  | 2,439 |  |  |  | 1,866 |  |  |  | 2,000 |
Amortization of servicing rights |  |  | (1,319 | ) |  |  | (992 | ) |  |  | (835 | )
Balances, December 31 |  |  | 6,169 |  |  |  | 5,049 |  |  |  | 4,175 |
Impairment allowance |  |  |  |  |  |  |  |  |  |  |  |
Balances, January 1 |  |  | (856 | ) |  |  | (803 | ) |  |  | (139 | )
Additions |  |  | (762 | ) |  |  | (792 | ) |  |  | (776 | )
Reductions |  |  | 594 |  |  |  | 739 |  |  |  | 112 |
Balances, December 31 |  |  | (1,024 | ) |  |  | (856 | ) |  |  | (803 | )
Mortgage servicing rights, net |  | $ | 5,145 |  |  | $ | 4,193 |  |  | $ | 3,372 |

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- Definition Summary of changes in mortgage servicing rights. + References No definition available. + Details
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