STOCKHOLDERS' EQUITY (Details) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) shares $ / shares	Jun. 30, 2015 $ / shares	Dec. 31, 2015 USD ($) $ / shares shares
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	2,000,000		2,000,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) | $ / shares	$ 0.01		$ 0.01
Preferred stock, shares issued	0		0
Preferred Stock, Shares Outstanding	0		0
Common stock, shares authorized	150,000,000		150,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share) | $ / shares	$ 0.01		$ 0.01
Common Stock, Shares, Issued	73,339,655		72,926,205
Common stock, shares outstanding	73,095,926		72,682,476
Warrant
Class of Stock [Line Items]
Debt Conversion, Converted Instrument, Warrants or Options Issued	9,471,000
Proceeds from Warrant Exercises (in Dollars) | $	$ 88.3
Investment Warrants, Exercise Price (in Dollars per share) | $ / shares	$ 81.277
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt | $			$ 21.0
Convertible Debt
Class of Stock [Line Items]
Debt Instrument, Convertible, Number of Equity Instruments	600,000
Payments for Hedge, Financing Activities | $	$ 147.0
Conversion of Stock, Conversion Ratio	15.7858	0.0157858
Debt Instrument, Convertible, Conversion Price (in Dollars per share) | $ / shares	$ 63.35	$ 63.35