Other Intangible Assets Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount				$ 8,858	$ 8,690
Accumulated Amortization				(7,197)	(6,838)
Net Carrying Amount	$ 1,661	$ 1,852	$ 2,289	1,661	1,852
Rollforward of Intangible Assets:
Beginning balance	1,852	2,289	2,696
Intangible Assets Acquired	168	0	93
Intangible Assets Disposed	0	0	0
Amortization of Intangible Assets	(359)	(437)	(500)
Ending balance	1,661	1,852	2,289
Depositor Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount				2,247	2,247
Accumulated Amortization				(2,247)	(2,247)
Net Carrying Amount	0	0	0	0	0
Rollforward of Intangible Assets:
Beginning balance	0	0	0
Intangible Assets Acquired	0	0	0
Intangible Assets Disposed	0	0	0
Amortization of Intangible Assets	0	0	0
Ending balance	0	0	0
Mortgage Servicing Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount				2,229	2,061
Accumulated Amortization				(1,913)	(1,799)
Net Carrying Amount	316	262	437	316	262
Rollforward of Intangible Assets:
Beginning balance	262	437	565
Intangible Assets Acquired	168	0	93
Intangible Assets Disposed	0	0	0
Amortization of Intangible Assets	(114)	(175)	(221)
Ending balance	316	262	437
Customer Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount				4,382	4,382
Accumulated Amortization				(3,037)	(2,792)
Net Carrying Amount	1,345	1,590	1,852	$ 1,345	$ 1,590
Rollforward of Intangible Assets:
Beginning balance	1,590	1,852	2,131
Intangible Assets Acquired	0	0	0
Intangible Assets Disposed	0	0	0
Amortization of Intangible Assets	(245)	(262)	(279)
Ending balance	$ 1,345	$ 1,590	$ 1,852