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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2018
Restricted Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of unvested restricted stock and Shares unit
    Ordinary Shares     Weighted Average Grant 
Date Fair Value		  
Unvested at December 31, 2017     7,360,344     $ 26.18  
Granted     3,930,880       26.50  
Vested     (2,730,727 )     26.38  
Forfeited     (854,110 )     26.79  
Unvested at December 31, 2018     7,706,387       26.20  
Restricted Shares Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of unvested restricted stock and Shares unit
  Market Performance
Shares		  Weighted Average Grant 
Date Fair Value		 
Unvested at December 31, 2017  1,345,060  $22.73 
Granted  596,540   27.29 
Vested  —   — 
Performance adjustment  (820,920)  22.14 
Unvested at December 31, 2018  1,120,680   25.58