Other (Expense) Income

12 Months Ended

Dec. 31, 2020

Other Income and Expenses [Abstract]

Other (Expense) Income

Other (Expense) Income

Other (expense) income consists of the following (dollars in thousands):

	Years Ended December 31,
	2020		2019		2018
Interest and other income, net	$	18,704	$	21,623	$	13,843
Interest expense	(19,435)		(18,207)		(13,840)
Interest expense on nonrecourse liability related to sale of future royalties	(4,319)		(4,500)		(4,271)
Total	$	(5,050)	$	(1,084)	$	(4,268)

Interest expense includes noncash interest expense related to amortization of deferred financing costs and amortization of the debt discount on the 2023 Notes, in the amount of $16.6 million, $15.7 million, and $11.8 million for the years ended December 31, 2020, 2019 and 2018, respectively (see Note 6).

Interest income includes interest earned from cash, cash equivalents, and marketable securities of $16.0 million, $21.3 million, and $13.8 million for the years ended December 31, 2020, 2019, and 2018, respectively.