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 June 30, 2015 and March 31, 2015 (in thousands):



June 30, 2015	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	$	296,013	$	—	$	—		$	296,013	$	296,013	$	—	$	—
Level 1:
Mutual Funds	7,835		206		(15		)	8,026		—		8,026		—
Money Market Funds	175,001		—		—			175,001		175,001		—		—
Subtotal	182,836		206		(15		)	183,027		175,001		8,026		—
Level 2:
Government Agency Securities	89,794		40		(21		)	89,813		—		50,095		39,718
Commercial Paper	12,367		7		(2		)	12,372		3,299		9,073		—
Corporate Bonds	101,409		137		(24		)	101,522		1,066		47,421		53,035
Subtotal	203,570		184		(47		)	203,707		4,365		106,589		92,753

Total cash, cash equivalents and investments measured at fair value	$	682,419	$	390	$	(62	)	$	682,747	$	475,379	$	114,615	$	92,753



March 31, 2015	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	$	273,350	$	—	$	—		$	273,350	$	273,350	$	—	$	—
Level 1:
Mutual Funds	5,398		147		(25		)	5,520		—		5,520		—
Level 2:
Government Agency Securities	89,875		37		(22		)	89,890		—		43,024		46,866
Commercial Paper	17,574		10		—			17,584		3,500		14,084		—
Corporate Bonds	95,759		199		(3		)	95,955		—		35,231		60,724
Subtotal	203,208		246		(25		)	203,429		3,500		92,339		107,590

Total cash, cash equivalents and investments measured at fair value	$	481,956	$	393	$	(50	)	$	482,299	$	276,850	$	97,859	$	107,590