Other Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Estimated Annual Amoritzation Expense: [Abstract]
2017		$ 491
2018		419
2019		329
2020		281
2021		242
Later Years		934
Net Carrying Amount		2,696	$ 3,107	$ 3,625	$ 4,140
Mortgage Servicing Rights [Member]
Estimated Annual Amoritzation Expense: [Abstract]
2017	[1]	215
2018	[1]	160
2019	[1]	87
2020	[1]	56
2021	[1]	34
Later Years	[1]	13
Net Carrying Amount	[1]	565	679	832	960
Customer Intangibles [Member]
Estimated Annual Amoritzation Expense: [Abstract]
2017	[2]	276
2018	[2]	259
2019	[2]	242
2020	[2]	225
2021	[2]	208
Later Years	[2]	921
Net Carrying Amount	[2]	$ 2,131	$ 2,428	$ 2,783	$ 3,119

[1] Amortization of mortgage servicing rights is reported in the consolidated statements of income as a reduction of mortgage servicing fee income, which is included with fees for other services to customers.

[2] Amortization of depositor intangibles and customer intangibles are reported in the consolidated statements of income as a component of other operating expense.