CASH, CASH EQUIVALENTS AND INVESTMENTS

12 Months Ended

Mar. 31, 2014

CASH, CASH EQUIVALENTS AND INVESTMENTS [Abstract]

Cash, Cash Equivalents and Investments

CASH, CASH EQUIVALENTS, AND INVESTMENTS

The following tables summarize the Company’s cash and available-for-sale securities’ adjusted cost, gross unrealized gains, gross unrealized losses, and fair value by significant investment category recorded as cash and cash equivalents, short-term, or long-term investments as of March 31, 2014 and 2013 (in thousands):

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Cash & Cash Equivalents		Short-term investments (due in 1 year or less)		Long-term investments (due in 1 to 3 years)
Cash	$	232,704	$	—	$	—		$	232,704	$	232,704	$	—	$	—
Level 1:
Mutual Funds	1,779		31		(3		)	1,807		—		1,807		—
Level 2:
Government Agency Securities	53,976		43		(9		)	54,010		—		21,325		32,685
Commercial Paper	47,766		7		—			47,773		—		47,773		—
Corporate Bonds	98,289		195		(17		)	98,467		—		30,810		67,657
Certificates of Deposits ("CDs")	1,002		—		—			1,002		—		1,002		—
Subtotal	201,033		245		(26		)	201,252		—		100,910		100,342
Total cash, cash equivalents and investments measured at fair value	$	435,516	$	276	$	(29	)	$	435,763	$	232,704	$	102,717	$	100,342

March 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Cash & Cash Equivalents		Short-term investments (due in 1 year or less)		Long-term investments (due in 1 to 3 years)
Cash	$	118,881	$	—	$	—		$	118,881	$	118,881	$	—	$	—
Level 1:
U.S. Treasury Bills and Government Agency Securities	135,120		22		—			135,142		104,995		7,243		22,904
Level 2:
U.S. Treasury Bills and Government Agency Securities	91,284		38		(4		)	91,318		—		58,864		32,454
Commercial Paper	20,570		9		—			20,579		4,900		15,679		—
Corporate Bonds	58,644		54		(5		)	58,693		—		34,795		23,898
CDs	1,002		3		—			1,005		—		—		1,005
Subtotal	171,500		104		(9		)	171,595		4,900		109,338		57,357
Total cash, cash equivalents and investments measured at fair value	$	425,501	$	126	$	(9	)	$	425,618	$	228,776	$	116,581	$	80,261

As of March 31, 2014 and 2013, all of the Company's investments are classified as available-for-sale securities. The carrying value of available-for-sale securities included in cash equivalents approximates fair value because of the short maturity of those instruments.

The Company did not incur any material realized or unrealized net gains or losses for the fiscal years ended March 31, 2014 and 2013.

There were no transfers between fair value measurement levels during the years ended March 31, 2014 and 2013.