Income Taxes Reconciliation of unrecognized tax benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 1,226,000	$ 664,000	$ 633,000
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	12,000	10,000	117,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	2,000	781,000	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	3,000	0	9,000
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	283,000	229,000	77,000
Unrecognized Tax Benefits, Ending Balance	954,000	1,226,000	664,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	900,000	1,100,000	500,000
Income Tax Examination, Penalties and Interest Expense	7,500	(79,500)	(3,500)
Income Tax Examination, Penalties and Interest Accrued	$ 146,000	$ 153,500	$ 74,000