Accounts Receivable (Allowance for Credit Losses) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Accounts Receivable [Abstract]
Beginning Balance	$ 16,432
Current period provision for expected credit losses	13,092
Write-offs charged against the allowance	(13,540)
Recoveries collected	4,722
Impact of changes in foreign currency	(49)
Ending Balance	$ 20,657