FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2019

Schedule of the fair value hierarchy of the Company's financial assets and liabilities measured at fair value

The following table represents the fair value hierarchy of the Company's financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2019:



	Level 1		Level 2		Total
	(in thousands)
Money market funds	$	1,438	$	—	$	1,438
Certificates of deposit	—		180,321		180,321
Government debt securities	—		211,995		211,995
Corporate debt securities	—		297,507		297,507
	1,438		689,823		691,261
Derivative contracts	—		1,109		1,109
Total financial assets	$	1,438	$	690,932	$	692,370
Derivative contracts	—		15		15
Total financial liabilities	$	—	$	15	$	15

The following table represents the fair value hierarchy of the Company's financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2018:



	Level 1		Level 2		Total
	(in thousands)
Money market funds	$	1,265			$	1,265
Certificates of deposit			95,038		95,038
Government debt securities			100,478		100,478
Corporate debt securities			186,208		186,208
	1,265		381,724		382,989
Long-term restricted cash	—		7,884		7,884
Derivative contracts	—		96		96
Total financial assets	$	1,265	$	389,704	$	390,969
Derivative contracts	—		2,536		2,536
Total financial liabilities	$	—	$	2,536	$	2,536