Convertible Debt (Tables)

3 Months Ended

Mar. 31, 2013

Debt Disclosure [Abstract]

Key Components of Convertible Debt

The following table represents the key components of our interest expense on convertible debt (table in thousands):

	For the Three Months Ended
	March 31, 2013		March 31, 2012
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