SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock options
Option Exercises
Options exercised during period (in shares)	203,494	354,252	414,499	784,724
Net proceeds from options exercised during the period	$ 2.0	$ 2.3	$ 3.4	$ 5.6
Restricted stock units
Restricted Stock Units
Number of shares issued due to vesting (in shares)	42,697	0	42,697	0