Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Interest Expense Recognized Related to Convertible Notes

The following table includes total interest expense recognized related to the Convertible Notes and 2027 Notes (in thousands):

	Year Ended December 31,
	2019		2018		2017
Contractual interest expense	$	35,383	$	40,151	$	11,406
Amortization of debt issuance costs	1,670		4,663		4,050
Amortization of debt discount	8,272		34,228		34,039
	$	45,325	$	79,042	$	49,495