Income Taxes (Reconciliation of income tax) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income taxes
Tax expense at U.S. statutory rates									$ 2,927,000	$ 3,209,000	$ (290,000)
State tax expense (benefit), net of federal benefit									939,000	815,000	235,000
Other adjustments against income tax expense (benefit)									934,000	236,000	760,000
Total Income Tax Provision	$ 1,450,000	$ 1,295,000	$ 1,575,000	$ 480,000	$ 1,230,000	$ 1,375,000	$ 1,325,000	$ 330,000	$ 4,800,000	$ 4,260,000	$ 705,000