Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

The Notes consist of the following components as of March 31, 2018 and December 31, 2017 (in thousands):

	March 31, 2018			December 31, 2017
Liability component:
Principal	$	690,000		$	690,000
Less: debt discount and issuance costs, net of amortization	(21,255		)	(27,087		)
Net carrying amount	$	668,745		$	662,913
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 for the three months ended March 31, 2018 and 2017 (in thousands):

	For the Three Months Ended March 31,
	2018			2017
Amortization of debt discount and issuance costs	$	5,832		$	5,632
Capitalization of interest expense	(982		)	(1,035		)
Total interest expense	$	4,850		$	4,597