Quarterly report pursuant to Section 13 or 15(d)

Employee Benefits and Compensation Plans - Summary of Restricted Unit Activity (Details 2)

v3.10.0.1
Employee Benefits and Compensation Plans - Summary of Restricted Unit Activity (Details 2)
9 Months Ended
Sep. 30, 2018
$ / shares
shares
Performance-Based Awards  
Number of Restricted Share Awards  
Granted 300,000
Restricted share units | Time-Based Awards  
Number of Restricted Share Awards  
Non-vested as of January 1, 2018 2,555,477
Granted 1,613,077
Vested (1,032,760)
Forfeited or expired (142,227)
Non-vested and expected to vest as of September 30, 2018 2,993,567
Weighted- Average Grant-Date Fair Value  
Non-vested as of January 1, 2018 | $ / shares $ 50.86
Granted | $ / shares 56.73
Vested | $ / shares 50.66
Forfeited or expired | $ / shares 53.31
Non-vested and expected to vest as of September 30, 2018 | $ / shares $ 53.98
Restricted share units | Performance-Based Awards  
Number of Restricted Share Awards  
Non-vested as of January 1, 2018 0
Granted 843,998
Vested 0
Forfeited or expired (18,384)
Non-vested and expected to vest as of September 30, 2018 825,614
Weighted- Average Grant-Date Fair Value  
Non-vested as of January 1, 2018 | $ / shares $ 0
Granted | $ / shares 56.58
Vested | $ / shares 0
Forfeited or expired | $ / shares 56.43
Non-vested and expected to vest as of September 30, 2018 | $ / shares $ 56.58
Restricted share units | Market-Based Awards  
Number of Restricted Share Awards  
Non-vested as of January 1, 2018 50,000
Granted 0
Vested 0
Forfeited or expired 0
Non-vested and expected to vest as of September 30, 2018 50,000
Weighted- Average Grant-Date Fair Value  
Non-vested as of January 1, 2018 | $ / shares $ 59.43
Granted | $ / shares 0
Vested | $ / shares 0
Forfeited or expired | $ / shares 0
Non-vested and expected to vest as of September 30, 2018 | $ / shares $ 59.43