SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	May. 12, 2015	May. 11, 2015
Option Exercises
Options exercised during period (in shares)	354,252	543,680	784,724	968,573
Net proceeds from options exercised during the period	$ 2.3	$ 2.5	$ 5.6	$ 4.8
Common Stock
Increase in authorized shares of common stock					100,000,000
Authorized shares of common stock					200,000,000	100,000,000