Annual report pursuant to Section 13 and 15(d)

EQUITY AND EARNINGS PER SHARE - Outstanding Options (Details)

v3.6.0.2
EQUITY AND EARNINGS PER SHARE - Outstanding Options (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 07, 2015
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   5,126,906 5,421,561
Options exercisable (in shares)   5,075,878  
Ending Balance (in dollars per share)   $ 2.79  
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   6,301  
Stock Option | Various      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   3,666  
Options exercisable (in shares)   333  
Ending Balance (in dollars per share)   $ 0.00  
Intrinsic value   $ 0.0  
Stock Option | 2002 - 2007      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   587,277  
Options exercisable (in shares)   116,330  
Ending Balance (in dollars per share)   $ 13.13  
Fair value at date of grant   $ 6.4  
Intrinsic value   $ 0.0  
Stock Option | Mar-11      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   311,853  
Options exercisable (in shares)   206,881  
Ending Balance (in dollars per share)   $ 1.00  
Fair value at date of grant   $ 7.0  
Intrinsic value   $ 0.6  
Stock Option | Sep-11      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   524,212  
Options exercisable (in shares)   376,268  
Ending Balance (in dollars per share)   $ 1.00  
Fair value at date of grant   $ 5.6  
Intrinsic value   $ 1.0  
Stock Option | Apr-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   348,352  
Options exercisable (in shares)   279,452  
Ending Balance (in dollars per share)   $ 1.00  
Fair value at date of grant   $ 5.6  
Intrinsic value   $ 0.8  
Stock Option | May-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   396,316  
Options exercisable (in shares)   316,871  
Ending Balance (in dollars per share)   $ 1.00  
Fair value at date of grant   $ 7.6  
Intrinsic value   $ 0.9  
Stock Option | Jul-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   437,991  
Options exercisable (in shares)   353,674  
Ending Balance (in dollars per share)   $ 1.00  
Fair value at date of grant   $ 8.3  
Intrinsic value   $ 1.0  
Stock Option | Jan-13      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   958,331  
Options exercisable (in shares)   872,528  
Ending Balance (in dollars per share)   $ 2.32  
Fair value at date of grant   $ 18.0  
Intrinsic value   $ 1.3  
Stock Option | Feb-13      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   383,331  
Options exercisable (in shares)   349,011  
Ending Balance (in dollars per share)   $ 2.95  
Fair value at date of grant   $ 8.4  
Intrinsic value   $ 0.3  
Stock Option | Jun-13      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   670,829  
Options exercisable (in shares)   610,770  
Ending Balance (in dollars per share)   $ 3.23  
Fair value at date of grant   $ 3.8  
Intrinsic value   $ 0.4  
Stock Option | Nov-13      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   965,847  
Options exercisable (in shares)   879,372  
Ending Balance (in dollars per share)   $ 3.57  
Fair value at date of grant   $ 6.0  
Intrinsic value   $ 0.5  
Stock Option | Aug-14      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (in shares)   765,416  
Options exercisable (in shares)   714,388  
Ending Balance (in dollars per share)   $ 4.01  
Fair value at date of grant   $ 1.7  
Intrinsic value   $ 0.3  
Stock Option | Prior to 2008      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (173,853)  
Ending Balance (in dollars per share)   $ 14.09  
Stock Option | Oct-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (15,972)  
Ending Balance (in dollars per share)   $ 1.48  
Stock Option | Sep-13      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (51,306)  
Ending Balance (in dollars per share)   $ 1.67  
Stock Option | 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (216,186)  
Ending Balance (in dollars per share)   $ 1.46  
Stock Option | 2015      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (202,446)  
Ending Balance (in dollars per share)   $ 1.00  
Stock Option | 2016      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (266,657)  
Ending Balance (in dollars per share)   $ 3.01  
Stock Option | 2002-2006      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, (in shares)   (300,095)  
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 178,740    
Stock Option | Mar-11      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 24,354    
Stock Option | Sep-11      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 92,963    
Stock Option | Apr-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 32,105    
Stock Option | May-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 12,987    
Stock Option | Jul-12      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of stock options - equitable adjustment (in shares) 16,331