FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2016 (in thousands):

			Fair Value Measurements, Using
	Total carrying value as of September 30, 2016		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents	$	28,072	$	28,072	$	—	$	—
Short-term investments		231,452		231,452		—		—
Long-term investments		15,217		15,217		—		—

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2015 (in thousands):

			Fair Value Measurements, Using
	Total carrying value as of December 31, 2015		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents	$	34,980	$	34,980	$	—	$	—
Short-term investments		297,981		297,981		—		—
Long-term investments		2,187		2,187		—		—