OTHER INCOME (LOSS)

6 Months Ended

Jun. 30, 2021

Other Income And Expenses [Abstract]

OTHER INCOME (LOSS)

13. OTHER INCOME (LOSS)

The following table summarizes other income (loss) for the periods indicated:

		For the Three Months Ended June 30,						For the Six Months Ended June 30,
		2021			2020			2021			2020
	(in thousands)
Interest expense		$	(15,831	)	$	(13,713	)	$	(31,482	)	$	(27,328	)
Interest income			52			638			111			2,777
Amortization of investment discount			21			999			157			3,963
Gain from sale of Priority Review    Voucher			102,000			—			102,000			108,069
Other (expense) income, net			(427	)		(371	)		(499	)		721
Total other income (loss)		$	85,815		$	(12,447	)	$	70,287		$	88,202