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Intangible Assets (Details 3) (Mortgage Service Rights [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Mortgage Service Rights [Member]
         
Changes in mortgage servicing rights          
Balance at beginning of period   $ 2,272 $ 2,308 $ 2,356 $ 2,666
Re-measurement to fair value upon election to measure          
Servicing rights at fair value 0 0 742 0  
Originated mortgage servicing rights 231 215 559 436  
Changes in fair value:          
Due to change in model inputs and assumptions 96 0 372 0  
Other changes in fair value (369) 0 (1,357) 0  
Amortization 0 (221) 0 (526)  
Balance at end of period $ 2,624 $ 2,266 $ 2,624 $ 2,266 $ 2,666