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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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision at the expected statutory rate									$ 4,499	$ 2,672	$ 3,940
Effect of tax-exempt income									(683)	(704)	(668)
Effect of investment in life insurance									(66)	(60)	(89)
State income taxes, net of federal tax benefit									146
Nondeductible interest									59	40	30
Low income housing partnership tax credits									(83)	(168)	(46)
Nondeductible merger and acquisition expense										193	191
Rate change adjustment											1,169
Other items									(147)	156	(27)
Provision for income taxes	$ 1,186	$ 709	$ 980	$ 850	$ 916	$ 548	$ 452	$ 213	$ 3,725	$ 2,129	$ 4,500

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