Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION - Restricted Stock, RSUs, Performance Shares (Details)

v3.8.0.1
SHARE-BASED COMPENSATION - Restricted Stock, RSUs, Performance Shares (Details) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Weighted-Average Grant Date Fair Value Per Share (USD per share):      
Granted (in USD per share) $ 11.13 $ 9.59 $ 10.86
Restricted Stock Awards      
Shares:      
Nonvested at beginning of period (in shares) 656    
Granted (in shares) 0    
Assumed (in shares) 0    
Vested (in shares) (174)    
Forfeited (in shares) (34)    
Nonvested at end of period (in shares) 448 656  
Weighted-Average Grant Date Fair Value Per Share (USD per share):      
Nonvested at beginning of period (in USD per share) $ 9.68    
Granted (in USD per share) 0.00    
Assumed (in USD per share) 0.00    
Vested (in USD per share) 9.68    
Forfeited (in USD per share) 9.68    
Nonvested at end of period (in USD per share) $ 9.68 $ 9.68  
Restricted Stock Units      
Shares:      
Nonvested at beginning of period (in shares) 14,733    
Granted (in shares) 6,232    
Assumed (in shares) 0    
Vested (in shares) (4,267)    
Forfeited (in shares) (539)    
Nonvested at end of period (in shares) 16,159 14,733  
Weighted-Average Grant Date Fair Value Per Share (USD per share):      
Nonvested at beginning of period (in USD per share) $ 9.61    
Granted (in USD per share) 13.45    
Assumed (in USD per share) 0.00    
Vested (in USD per share) 8.72    
Forfeited (in USD per share) 10.91    
Nonvested at end of period (in USD per share) $ 11.26 $ 9.61  
Performance Share Awards      
Shares:      
Nonvested at beginning of period (in shares) 3,307    
Granted (in shares) 1,278    
Assumed (in shares) 0    
Vested (in shares) (1,550)    
Forfeited (in shares) (17)    
Nonvested at end of period (in shares) 3,018 3,307  
Weighted-Average Grant Date Fair Value Per Share (USD per share):      
Nonvested at beginning of period (in USD per share) $ 9.63    
Granted (in USD per share) 12.18    
Assumed (in USD per share) 0.00    
Vested (in USD per share) 9.00    
Forfeited (in USD per share) 11.07    
Nonvested at end of period (in USD per share) $ 10.67 $ 9.63