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Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income before income tax expense	$ 2,536	$ 6,765	$ 3,867	$ 4,486	$ 3,551	$ 3,520	$ 2,340	$ 4,819	$ 17,654	$ 14,231	$ 17,065
Income tax reconciliation, tax expense at statutory federal rate of 21%, 35%, and 35% applied to income before income tax expense, respectively									3,707	4,981	5,973
Income tax reconciliation, state income tax, net of federal effect									803	511	206
Income tax reconciliation, tax exempt security and loan income, net of TEFRA adjustments									(847)	(1,045)	(1,114)
Income tax reconciliation, bank-owned life insurance									(250)	(438)	(341)
Income tax reconciliation, tax credits, net									(2,157)	(2,390)	(2,696)
Income tax reconciliation, deferred tax revaluation adjustment									0	629	0
Income tax reconciliation, other adjustments									95	78	128
Total income tax expense	$ 1,528	$ (1,464)	$ (578)	$ (837)	$ 486	$ (936)	$ (454)	$ (1,422)	$ 1,351	$ 2,326	$ 2,156
Effective tax rate									7.65%	16.34%	12.63%

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