| Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Thousands | 9 Months Ended | |
|---|---|---|
| Sep. 30, 2020 | Sep. 30, 2019 | |
| Accounts Receivable, Allowance for Credit Loss [Roll Forward] | ||
| Allowance for credit loss, beginning of period | $ 2,260 | $ 2,765 | 
| Recoveries of costs and expenses, net | (1,089) | (134) | 
| Account write-offs and other | (191) | (45) | 
| Allowance for credit loss, end of period | $ 980 | $ 2,586 | 
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- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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