FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2015

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 June 30, 2015 (in thousands):

			Fair Value Measurements, Using
	Total carrying value as of June 30, 2015		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents	$	39,086	$	39,086	$	—	$	—
Short-term investments	246,986		246,986		—		—
Long-term investments	3,888		3,888		—		—

The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2014 (in thousands):

			Fair Value Measurements, Using
	Total carrying value as of December 31, 2014		Quoted prices in active markets  (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents	$	970	$	970	$	—	$	—
Short-term investments	243,088		243,088		—		—
Long-term investments	3,047		3,047		—		—