Quarterly report pursuant to Section 13 or 15(d)

EQUITY AND EARNINGS PER SHARE - Summary of Outstanding Options - Period End (Details)

v3.10.0.1
EQUITY AND EARNINGS PER SHARE - Summary of Outstanding Options - Period End (Details)
$ / shares in Units, $ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of unexercised options (in shares) 5,623,138.000
Options exercisable (in shares) 1,060,257.000
Issued to the independent directors  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of unexercised options (in shares) 6,000
Stock Options | Issued to the independent directors  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Date of grant Various
Number of unexercised options (in shares) 6,000
Options exercisable (in shares) 6,000
Weighted average exercise price (in dollars per share) | $ / shares $ 13.49
Intrinsic Value of Exercisable Options as of September 30, 2018 (millions) | $ $ 0.0
Stock Options | Manager | 2016  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Date of grant 2016
Number of unexercised options (in shares) 533,334
Options exercisable (in shares) 200,000
Weighted average exercise price (in dollars per share) | $ / shares $ 13.70
Intrinsic Value of Exercisable Options as of September 30, 2018 (millions) | $ $ 0.8
Stock Options | Manager | 2017  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Date of grant 2017
Number of unexercised options (in shares) 2,638,804
Options exercisable (in shares) 565,459
Weighted average exercise price (in dollars per share) | $ / shares $ 14.50
Intrinsic Value of Exercisable Options as of September 30, 2018 (millions) | $ $ 1.9
Stock Options | Manager | 2018  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Date of grant 2018
Number of unexercised options (in shares) 2,445,000
Options exercisable (in shares) 288,798
Weighted average exercise price (in dollars per share) | $ / shares $ 17.11
Intrinsic Value of Exercisable Options as of September 30, 2018 (millions) | $ $ 0.2
Options Granted in 2016  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of unexercised options (in shares) 400,000
Weighted average exercise price (in dollars per share) | $ / shares $ 13.70
Options Granted in 2017  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of unexercised options (in shares) 1,130,916
Weighted average exercise price (in dollars per share) | $ / shares $ 14.50
Options Assigned  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of unexercised options (in shares) 1,530,916