XML 46 R43.htm IDEA: XBRL DOCUMENT

Key Components of Convertible Debt (Detail) (Convertible Senior Notes 2011 and 2013, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Convertible Senior Notes 2011 and 2013
Debt Instrument [Line Items]
Contractual interest expense on the coupon	$ 7,460	$ 7,523
Amortization of the discount component recognized as interest expense	15,578	14,700
Total interest expense on the convertible debt	$ 23,038	$ 22,223

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References+ Details