Legal Proceedings (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) item
Other Accrued Liabilities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Estimated future claims	$ 129
Other Long Term Liabilities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Estimated future claims	721
Other Current Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Insurance receivable	129
Other Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Insurance receivable	$ 721
Maximum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Potential exposure, per call | item	1,500
Minimum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Potential exposure, per call | item	500