Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Tax expense at U.S. statutory rates	$ 3,976	$ 4,017	$ 5,716
State tax expense (benefit), net of federal benefit	1,079	1,134	(769)
Other, net	365	549	633
Federal tax reform - deferred tax rate change	0	0	(11,500)
Total Income Tax Provision	$ 5,420	$ 5,700	$ (5,920)