Income Taxes (Reconciliation of income tax) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Tax expense at U.S. statutory rates									$ 3,209,000	$ (290,000)	$ 3,976,000
State tax expense (benefit), net of federal benefit									815,000	235,000	1,079,000
Other adjustments against income tax expense (benefit)									236,000	760,000	365,000
Total Income Tax Provision	$ 1,230,000	$ 1,375,000	$ 1,325,000	$ 330,000	$ 2,680,000	$ 1,130,000	$ (3,805,000)	$ 700,000	$ 4,260,000	$ 705,000	$ 5,420,000