MARKETABLE SECURITIES (Details) $ in Thousands	Mar. 31, 2016 USD ($) item
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, amortized cost	$ 44,050
Due in one year or less, gross unrealized gains	21
Due in one year or less, gross unrealized losses	12
Due in one year or less, fair value	44,059
Due after one year to two years, amortized cost	43,148
Due after one year to two years, gross unrealized gains	37
Due after one year to two years, gross unrealized losses	34
Due after one year to two years, fair value	43,151
Amortized cost	87,198
Gross unrealized gains	58
Gross unrealized losses	46
Fair value	$ 87,210
Number of loss positions | item	32
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 82,183
Gross unrealized gains	55
Gross unrealized losses	36
Fair value	82,202
Governmental bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	5,015
Gross unrealized gains	3
Gross unrealized losses	10
Fair value	$ 5,008