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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts receivable $ 4,614 $ 4,067
Common Stock, Par or Stated Value Per Share $ 0.00001 $ 0.00001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 65,585,000 64,172,000
Common stock, shares outstanding 65,585,000 64,172,000