SUBSEQUENT EVENT (Details) - USD ($)	Aug. 02, 2017	Jul. 31, 2017
Original Notes 3.75% Convertible Senior Notes due October 15, 2018
Subsequent Event [Line Items]
Interest rate on convertible notes (as a percent)		3.75%
Subsequent Event | New Notes 3.75% Convertible Senior Notes Due 2018
Subsequent Event [Line Items]
Interest rate on convertible notes (as a percent)	3.75%
Exchange fee ratio	$ 0.0025
Subsequent Event | Secured debt | Original Notes 3.75% Convertible Senior Notes due October 15, 2018
Subsequent Event [Line Items]
Term loan principal amount	61,300,000.0
Subsequent Event | Secured debt | New Notes 3.75% Convertible Senior Notes Due 2018
Subsequent Event [Line Items]
Term loan principal amount	$ 288,700,000.0