Accounts Receivable (Allowance) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	$ 5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$ 6,635