Employee Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Benefit Plans
Administrative expense	$ 2,900	$ 2,400	$ 1,100
Discretionary contribution	225,000	250,000	265,000
Deferred Compensation Expense Non Qualified Plan	$ 105,000	$ 135,000	$ 149,000