Income Tax (Reconciliation of Income Tax Expense at Federal Statutory Rate to Actual Tax Expense) (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Dec. 22, 2017	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of federal statutory to actual tax expense
Federal statutory income tax at 34%			$ 5,483	$ 4,583	$ 6,496
State taxes			(261)		145
Non tax captive insurance income			(275)	(245)	(310)
Tax credits			(134)	(134)	(96)
Tax-exempt income			(1,520)	(1,355)	(1,453)
Effect of "Tax Cuts and Jobs Act"					2,000
Equity compensation			(715)
Other			(219)	111	11
Income Tax Expense (Benefit), Total			$ 2,359	$ 2,960	$ 6,793
Effective tax rate			9.03%	13.56%	35.55%
Federal statutory income tax rate	34.00%	34.00%	21.00%	21.00%	34.00%