Pension Plan (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Pension Plan (Details) [Line Items]
Liability, Defined Benefit Pension Plan, Current	$ 751,000	$ 641,000
Liability, Defined Benefit Pension Plan, Noncurrent	3,200,000	$ 3,500,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	641,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	85,000
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 556,000