Mortgage Servicing Rights (Amortization method rollforward) (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Valuation Allowance for Impairment of Mortgage Servicing Rights Accounted for under the Amortization Method [Roll Forward]
Balance at Beginning of Period			$ (57)
Balance at End of Period	$ (21)		(21)
Mortgage Servicing Rights
Mortgage Servicing Rights Accounted for Under the Amortization Method {Rollforward)
Balance at Beginning of Period	21,238	$ 23,437	22,091	$ 24,297
Servicing Rights that Resulted From Asset Transfers	645	100	1,330	664
Amortization	(633)	(742)	(2,228)	(2,094)
Valuation Allowance Provision	(21)	21	36	(51)
Balance at End of Period	21,229	22,816	21,229	22,816
Valuation Allowance for Impairment of Mortgage Servicing Rights Accounted for under the Amortization Method [Roll Forward]
Balance at Beginning of Period	0	(72)	(57)	0
Valuation Allowance Provision	(21)	21	36	(51)
Balance at End of Period	(21)	(51)	(21)	(51)
Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method
Beginning of Period	26,205	25,848	22,837	30,100
End of Period	$ 24,419	$ 24,336	$ 24,419	$ 24,336