Other Intangible Assets Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount					$ 8,690	$ 8,690
Accumulated Amortization					(6,838)	(6,401)
Net Carrying Amount		$ 2,289	$ 2,696	$ 3,107	1,852	2,289
Finite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Beginning Balance		2,289	2,696	3,107
Intangible Assets Acquired		0	93	146
Impairment of Intangible Assets, Finite-lived		0	0	0
Amortization of Intangible Assets		(437)	(500)	(557)
Finite-Lived Intangible Assets, Ending Balance		1,852	2,289	2,696
Depositor Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]				2,247	2,247
Accumulated Amortization	[1]				(2,247)	(2,247)
Net Carrying Amount	[1]	0	0	0	0	0
Finite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Beginning Balance	[1]	0	0	0
Intangible Assets Acquired	[1]	0	0	0
Impairment of Intangible Assets, Finite-lived	[1]	0	0	0
Amortization of Intangible Assets	[1]	0	0	0
Finite-Lived Intangible Assets, Ending Balance	[1]	0	0	0
Mortgage Servicing Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[2]				2,061	2,061
Accumulated Amortization	[2]				(1,799)	(1,624)
Net Carrying Amount	[2]	437	565	679	262	437
Finite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Beginning Balance	[2]	437	565	679
Intangible Assets Acquired	[2]	0	93	146
Impairment of Intangible Assets, Finite-lived	[2]	0	0	0
Amortization of Intangible Assets	[2]	(175)	(221)	(260)
Finite-Lived Intangible Assets, Ending Balance	[2]	262	437	565
Customer Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]				4,382	4,382
Accumulated Amortization	[1]				(2,792)	(2,530)
Net Carrying Amount	[1]	1,852	2,131	2,428	$ 1,590	$ 1,852
Finite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Beginning Balance	[1]	1,852	2,131	2,428
Intangible Assets Acquired	[1]	0	0	0
Impairment of Intangible Assets, Finite-lived	[1]	0	0	0
Amortization of Intangible Assets	[1]	(262)	(279)	(297)
Finite-Lived Intangible Assets, Ending Balance	[1]	$ 1,590	$ 1,852	$ 2,131

[1] Amortization of depositor intangibles and customer intangibles are reported in the Consolidated Statements of Income as a component of other operating expense.

[2] 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.