Income Taxes (Significant components of the provision for income taxes) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal									$ 850,000	$ 2,900,000	$ 2,205,000
State									400,000	1,100,000	835,000
Total current									1,250,000	4,000,000	3,040,000
Total deferred									(545,000)	1,420,000	2,660,000
Total Income Tax Provision	$ 2,680,000	$ 1,130,000	$ (3,805,000)	$ 700,000	$ 1,560,000	$ 1,460,000	$ 1,850,000	$ 550,000	$ 705,000	$ 5,420,000	$ 5,700,000