Supplemental Cash Flow Data (Supplemental Disclosures of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Data [Abstract]
Income tax paid, net (refund)	$ 901	$ (6,404)
Investments in property, plant and equipment payable	237	131
Dividends Payable	1,713	$ 1,730
Long-term note receivable for asset sales	$ 22,400