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Accounts Receivable (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Receivables [Abstract]    
Accounts Receivable, Allowance for Credit Loss Roll Forward The activity in our accounts receivable allowance consists of the following for the three months ended March 31, 2021 and year ended December 31, 2020, respectively:
March 31,December 31,
20212020
Balance at beginning of year$8,745 $16,511 
Additional provisions1,495 4,339 
Write-offs(2,069)(22,205)
Opening balance sheet adjustment- ASU 2016 -13 adoption— 10,097 
Exchange differences169 3 
Balance at the end of year$8,340 $8,745 
  
Accounts Receivable, Allowance for Credit Loss, Current $ 8,745 $ 16,511
Additional provisions 1,495 4,339
Write-offs 2,069 22,205
Opening balance sheet adjustment- ASU 2016 -13 adoption 0 10,097
Exchange differences 169 3
Accounts Receivable, Allowance for Credit Loss, Current $ 8,340 $ 8,745