Business Acquisition (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Business Acquisition
Business Combination, Consideration Transferred	$ 72,850,000
Business Acquisitions, Consideration Transferred, Liabilities Incurred	1,056,000
Cash Acquired from Acquisition		$ 567,000
Current assets	6,221,000	6,221,000
Property, plant and equipment	2,567,000	2,567,000
Other assets	29,000	29,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount	34,999,000	34,999,000
Business Acquisitions, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	32,800,000	32,800,000
Fair Value of Assets Acquired		76,616,000
Business Acquisitions, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(2,710,000)	$ (2,710,000)
Net cash paid	$ 73,906,000		$ 73,906,000