Accounts Receivable - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance doubtful accounts, receivables	$ 523		$ 523		$ 944
Current period provision			$ (127)	$ 221
Selling, General and Administrative Expenses
Financing Receivable, Allowance for Credit Loss [Line Items]
Current period provision	$ (145)	$ 63