Convertible Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The net carrying amount of the liability component of the Notes consists of the following:

	As of December 31,
	2013			2012
Total convertible senior notes - par	$	400,000		$	400,000
Unamortized discount	(79,685		)	(103,482		)
	$	320,315		$	296,518

Interest Expense Associated with Convertible Notes

Total interest expense associated with the Notes, net of capitalized interest as applicable (see Note 21), consisted of the following for the years ended December 31, 2013, 2012, and 2011:

	2013		2012		2011
Contractual coupon interest rate	$	7,230	$	7,503	$	1,455
Amortization of discount and note issuance costs	22,980		21,623		3,944
	$	30,210	$	29,126	$	5,399