Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

The Notes consisted of the following components (in thousands):

	March 31, 2014
Liability component:
Principal	$	690,000
Less: debt discount, net of amortization	(99,286		)
Net carrying amount	$	590,714
Equity component:	$	101,276

Schedule of Interest Expense

The following table sets forth total interest expense included in the statement of operations related to the Notes (in thousands):

	For the Three Months Ended March 31, 2014
Amortization of debt discount	$	188
Amortization of debt issuance costs	1,990
Capitalization of interest expense	(237		)
Total interest expense	$	1,941