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 December 31, 2014 and March 31, 2014 (in thousands):



December 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	$	275,851	$	—	$	—		$	275,851	$	275,851	$	—	$	—
Level 1:
Mutual Funds	4,757		121		(75		)	4,803		—		4,803		—
Level 2:
Government Agency Securities	85,139		14		(67		)	85,086		—		32,235		52,851
Commercial Paper	18,589		3		—			18,592		4,499		14,093		—
Corporate Bonds	99,414		104		(57		)	99,461		—		39,516		59,945
Subtotal	203,142		121		(124		)	203,139		4,499		85,844		112,796

Total cash, cash equivalents and investments measured at fair value	$	483,750	$	242	$	(199	)	$	483,793	$	280,350	$	90,647	$	112,796



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
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