Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Convertible Senior Notes

The 2027 Notes consisted of the following components as of December 31, 2020 and 2019 (in thousands):

	December 31, 2020		December 31, 2019
Liability component:
Principal	$	1,150,000	$	1,150,000
Less: debt discount and issuance costs, net of amortization	(196,359)		(222,928)
Net carrying amount	$	953,641	$	927,072
Equity component:	$	220,529	$	220,529

The 2025 Notes consist of the following components as of December 31, 2020 and December 31, 2019 (in thousands):

	December 31, 2020		December 31, 2019
Liability component:
Principal	$	1,150,000	$	1,150,000
Less: debt discount and issuance costs, net of amortization	(196,934)		(237,281)
Net carrying amount	$	953,066	$	912,719
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 years ended December 31, 2020, 2019 and 2018 (in thousands):

	2020		2019		2018
Amortization of debt discount and issuance costs	$	67,153	$	52,059	$	46,493
Coupon interest payable on 2025 Notes	1,437		1,436		874
Coupon interest payable on 2027 Notes	4,312		1,557		—
Revolving credit facility contractual interest expense	548		513		368
Capitalization of interest expense	(4,330)		(6,201)		(4,533)
Total interest expense	$	69,120	$	49,364	$	43,202