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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 15,429 $ 13,026
Common Stock, Par or Stated Value Per Share $ 0.001 $ 0.001
Common Stock, Shares Authorized 300,000,000 300,000,000
Common Stock, Shares, Issued 89,431,296 85,700,953
Common Stock, Shares, Outstanding 89,101,716 85,308,386
Treasury Stock, Shares 329,580 392,567