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Revenue from Contract with Customers - Credit Losses (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]    
Contractual life of accounts receivable 30 days  
Period for analyzing historical loss data to determine loss experience 2 years  
Changes in the allowance for credit losses balance    
Balance at beginning of period $ 3,370  
Provision for credit losses 151 $ 2,235
Write-offs charged against the allowance (464)  
Balance at end of period $ 3,057