Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

The 2025 Notes consisted of the following components as of March 31, 2019 and December 31, 2018 (in thousands):

	March 31, 2019			December 31, 2018
Liability component:
Principal	$	1,150,000		$	1,150,000
Less: debt discount and issuance costs, net of amortization	(266,416		)	(275,920		)
Net carrying amount	$	883,584		$	874,080
Equity component:	$	285,225		$	285,225

Schedule of Interest Expense

The following table sets forth total interest expense included in the consolidated statements of income for the three months ended March 31, 2019 and 2018 (in thousands):

	For the Three Months Ended March 31,
	2019			2018
Amortization of debt discount and issuance costs	$	13,009		$	5,832
Coupon interest payable on 2025 Notes	359			—
Revolving credit facility contractual interest expense	139			—
Capitalization of interest expense	(1,391		)	(982		)
Total interest expense	$	12,116		$	4,850