Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation Allowance [Line Items]
Effective income tax rate (as a percent)	24.40%	23.20%	44.90%
Increase in expected income tax expense at statutory federal tax rate	$ 700
Income attributable to noncontrolling interest in subsidiary	11	$ 933	$ 870
Tax Act Adjustment	0	$ (707)	$ 8,965
Net operating loss carryforwards for U.S. federal income tax purposes	900
Reserve for loan losses	$ 1,800
Percentage of the amount the used reserve for loan losses would be subject to taxation, if, the reserve is used for purposes other than to absorb the losses for which it was established	150.00%
Amount of liability that would result if 100% of the reserve were recaptured on which no provision has been made	$ 500
Reserve for loan losses recaptured (as a percent)	100.00%
Deferred Tax Assets
Valuation Allowance [Line Items]
Tax Act Adjustment	$ 8,600
Affordable housing project
Valuation Allowance [Line Items]
Tax Act Adjustment	300
First Commons Bank
Valuation Allowance [Line Items]
Net operating loss carryforwards for U.S. federal income tax purposes	$ 700