v3.2.0.727
SHARE-BASED COMPENSATION (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
May. 31, 2015
installment
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Total after-tax share-based compensation cost by type of program          
Share-based compensation expense   $ 3.8 $ 4.3 $ 7.7 $ 7.1
Income tax provision related to share-based compensation expense   (1.1) (1.5) (2.4) (2.5)
After-tax share-based compensation expense   $ 2.7 $ 2.8 $ 5.3 $ 4.6
PRSUs | Executive officers | Contingent on Company's relative total shareholder return | Minimum          
Share-based compensation          
Percentage multiplier to determine number of shares to be awarded in connection with vesting of PRSUs 0.00%        
PRSUs | Executive officers | Contingent on Company's relative total shareholder return | Maximum          
Share-based compensation          
Percentage multiplier to determine number of shares to be awarded in connection with vesting of PRSUs 200.00%        
PRSUs | Executive officers | Contingent on having a positive Adjusted EBITDA          
Share-based compensation          
Number of installments that PRSUs will vest in | installment 3        
PRSUs | Certain executive officers and non-officer employees          
Share-based compensation          
Number of installments that PRSUs will vest in | installment 3