Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2014

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

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

	June 30, 2014
Liability component:
Principal	$	690,000
Less: debt discount, net of amortization	(94,615		)
Net carrying amount	$	595,385
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 June 30,			For the Six Months Ended June 30,
	2014			2014
Amortization of debt discount	$	442		$	630
Amortization of debt issuance costs	4,671			6,661
Capitalization of interest expense	(597		)	(834		)
Total interest expense	$	4,516		$	6,457