Pension Plan (Details) - The funded status of the plan - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan (Details) - The funded status of the plan [Line Items]
Projected benefit obligation at beginning of year	$ 15,145,000	$ 14,258,000
Interest cost	351,000	387,000
Actuarial (gain) loss	(311,000)	1,396,000
Settlements	(519,000)
Benefits paid	(611,000)	(896,000)
Projected benefit obligation at end of year	14,055,000	15,145,000
Fair value of plan assets at beginning of year	10,475,000	10,148,000
Actual return on plan assets	911,000	1,138,000
Company contributions	305,000	85,000
Settlements	(519,000)
Benefits paid	(611,000)	(896,000)
Fair value of plan assets at end of year	10,561,000	10,475,000
Funded status (underfunded)	(3,494,000)	(4,670,000)
Net actuarial loss	$ 8,001,000	$ 9,051,000	$ 8,296,000
Discount rate:
Components of cost	2.41%	3.20%
Benefit obligations	2.75%	2.41%
Expected return on plan assets	8.00%	8.00%
Rate of compensation increase