Credit Losses - Allowance for Credit Losses (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance of allowance for credit losses at January 1, 2021	$ 15,419
Current period provision (reversal) for expected losses	(1,447)
Write-offs charged against allowance	(3,030)
Recoveries of any amounts previously written off	110
Other	885
Balance of allowance for credit losses at September 30, 2021	$ 11,937