Pension Plan (Details) - USD ($)	1 Months Ended
	Jul. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Pension Plan (Details) [Line Items]
Liability, Defined Benefit Pension Plan, Current		$ 772,000	$ 660,000
Liability, Defined Benefit Pension Plan, Noncurrent		3,400,000	$ 3,800,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year		$ 660,000
Subsequent Event [Member]
Pension Plan (Details) [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 220,000