Mortgage Servicing Rights (Details 4) (Mortgage Servicing Rights., USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Mortgage Servicing Rights.
Constant Prepayment Rate
Decrease in fair value from 25 basis points ("bps") adverse change	$ (297)	$ (338)
Decrease in fair value from 50 bps adverse change	(585)	(671)
Discount Rate
Decrease in fair value from 25 bps adverse change	(337)	(421)
Decrease in fair value from 50 bps adverse change	$ (662)	$ (830)