DEBT - Components of Interest Expense (Detail) (2016 Convertible Senior Notes, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
2016 Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of the discount on the liability component	$ 1,666	$ 1,610
Cash interest related to the contractual interest coupon	801	818
Total	$ 2,467	$ 2,428