SHARE-BASED COMPENSATION (Details) - Time Based And Performance Based Shares - Employee - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based compensation
Shares granted	20,000
Weighted average grant date fair value (in dollars per share)	$ 42.23
Total stock-based compensation cost	$ 4.8	$ 1.9	$ 7.6	$ 3.7
Total unrecognized compensation cost	$ 13.3		$ 13.3
Unrecognized compensation cost over weighted-average period to be recognized			2 years