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Summary of Significant Accounting Policies - Allowance for Credit Loss (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Balance at December 31, 2019 $ 42,856
Credit memos charged to revenue 13,030
Allowance for bad debts charged to expense 6,197
Deductions and other (18,062)
Balance at March 31, 2020 $ 44,021