Other Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Estimated Annual Amoritzation Expense: [Abstract]
2019		$ 348
2020		298
2021		260
2022		222
2023		185
2024 and beyond		539
Net Carrying Amount		1,852	$ 2,289	$ 2,696	$ 3,107
Mortgage Servicing Rights
Estimated Annual Amoritzation Expense: [Abstract]
2019	[1]	103
2020	[1]	71
2021	[1]	50
2022	[1]	29
2023	[1]	9
2024 and beyond	[1]	0
Net Carrying Amount	[1]	262	437	565	679
Customer Intangibles
Estimated Annual Amoritzation Expense: [Abstract]
2019	[2]	245
2020	[2]	227
2021	[2]	210
2022	[2]	193
2023	[2]	176
2024 and beyond	[2]	539
Net Carrying Amount	[2]	$ 1,590	$ 1,852	$ 2,131	$ 2,428

[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.