OTHER INCOME AND LOSS (Tables)

9 Months Ended

Sep. 30, 2018

Other Income And Expenses [Abstract]

Summary of Other Income and Loss

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

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2018			2017			2018			2017
	(in thousand)
Interest expense	$	(10,681	)	$	(802	)	$	(26,460	)	$	(1,325	)
Interest income		1,477			438			5,236			813
Amortization of investment discount		2,295			433			5,123			693
Other (expense) income		(59	)		115			(570	)		522
Gain from sale of Priority Review Voucher		—			—			—			125,000
Total other (loss) income	$	(6,968	)	$	184		$	(16,671	)	$	125,703