Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

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

	June 30, 2016			December 31, 2015
Liability component:
Principal	$	690,000		$	690,000
Less: debt discount and issuance costs, net of amortization	(61,030		)	(71,953		)
Net carrying amount	$	628,970		$	618,047
Equity component:	$	101,276		$	101,276

Schedule of Interest Expense

The following table sets forth total interest expense included in the consolidated statements of income related to the Notes (in thousands):

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2016			2015			2016			2015
Amortization of debt discount and issuance costs	$	5,485		$	5,297		10,923			10,548
Capitalization of interest expense	(846		)	(619		)	(1,631		)	(1,294		)
Total interest expense	$	4,639		$	4,678		$	9,292		$	9,254