Pension Plan (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Pension Plan (Details) [Line Items]
Liability, Defined Benefit Pension Plan, Current	$ 128,000	$ 1,000,000
Liability, Defined Benefit Pension Plan, Noncurrent	4,000,000	$ 3,700,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	388,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 306,000