FAIR VALUE MEASUREMENT - Additional Information (Detail) - 3.50% Convertible Senior Notes Due 2019	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Oct. 22, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	3.50%	3.50%
Convertible Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	3.50%		3.50%	3.50%