Segment Information (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Revenues	$ 65,131,000	$ 67,881,000	$ 185,331,000	$ 206,525,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues			$ 0