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Summary of Significant Accounting Policies Allowance for credit losses (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance $ 5,246 $ 771
Provision for credit loss expense 2,126 5,716
Write-offs (1,283) (1,730)
Recoveries 265 489
Total ending allowance balance $ 6,354 $ 5,246