Revenues (Contract Assets and Liabilities) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Movement in Contract Assets and Liabilities [Roll Forward]
Unbilled revenue, beginning balance	$ 3,605
Increase (decrease) in unbilled revenue	(35)
Unbilled revenue, ending balance	3,570
Contract liability, beginning balance	2,873
Increase (decrease) in accrued customer advances	1,892
Contract liability, ending balance	$ 4,765