DEBT (Components of Interest Expense) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
2016 Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of the discount on the liability component	$ 1,633	$ 1,788	$ 4,865	$ 5,289
Cash interest related to the contractual interest coupon	807	934	2,438	2,803
Total	2,440	2,722	7,303	8,092
2012 Senior Convertible Notes
Debt Instrument [Line Items]
Amortization of the discount on the liability component	0	0	0	2,995
Cash interest related to the contractual interest coupon	0	0	0	1,633
Total	$ 0	$ 0	$ 0	$ 4,628