Mortgage Servicing Rights and Mortgage Servicing Activity (Changes in the Carrying Amount of Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Mortage Servicing Rights Amortized Value [Roll Forward]
Mortgage Servicing Rights Beginning of Period	$ 18,938	$ 22,011	$ 22,011
Mortgage Servicing Rights Additions	28	470
Amortization of Mortgage Servicing Rights (MSRs)	(839)	(991)
Mortgage Servicing Rights, End of Period	18,127	21,490	18,938
Mortage Servicing Rights Valuation Rollforward [Roll Forward]
Mortgage Servicing rights Valuation Allowance Beginning of Period	(399)	(955)	(955)
Mortgage Servicing Rights (MSR) Impairment Recovery/(Additions)	(469)	(176)	(600)
Mortgage Servicing rights Valuation Allowance, End of Period	(868)	(1,131)	(399)
Mortgage Servicing Rights Net Carrying balance	17,259	20,359	18,500
Fair Value of Mortgage Servicing Rights	17,460	20,526	19,149
Level 3
Mortage Servicing Rights Valuation Rollforward [Roll Forward]
Fair Value of Mortgage Servicing Rights	$ 17,460	$ 20,526	$ 19,149