Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Anti-dilutive Shares (Details)

v3.10.0.1
Earnings per Share - Anti-dilutive Shares (Details) - shares
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Performance based restricted stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive (shares) 1,659,050 1,769,447
Performance based stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive (shares) 586,253 651,255
Restricted stock awards and restricted units    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive (shares) 0 341,880
Stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive (shares) 621,747 1,539,266