The following table represents the Company’s cash, cash equivalents, and investments as of December 31, 2013 and March 31, 2013:



(in thousands)	December 31, 2013									March 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	225,310	$	—	$	—		$	225,310	$	118,881	$	—	$	—		$	118,881
Cash equivalents	10,223		1		—			10,224		109,895		—		—			109,895
Total cash and cash equivalents	$	235,533	$	1	$	—		$	235,534	$	228,776	$	—	$	—		$	228,776

Short-term investments (due in 1 year or less):
U.S. Treasury Bills and Government Agency Securities	$	19,227	$	6	$	(1	)	$	19,232	$	66,092	$	18	$	(3	)	$	66,107
Commercial paper	43,792		13		—			43,805		15,670		9		—			15,679
Corporate bonds	22,353		6		(2		)	22,357		34,766		31		(2		)	34,795
Certificates of deposit ("CDs")	1,002		1		—			1,003		—		—		—			—
Total short-term investments	$	86,374	$	26	$	(3	)	$	86,397	$	116,528	$	58	$	(5	)	$	116,581

Long-term investments (due in 1 to 3 years):
U.S. Treasury Bills and Government Agency Securities	$	36,929	$	23	$	(14	)	$	36,938	$	55,317	$	42	$	(1	)	$	55,358
Corporate bonds	69,772		116		(26		)	69,862		23,878		23		(3		)	23,898
CDs	—		—		—			—		1,002		3		—			1,005
Total long-term investments	$	106,701	$	139	$	(40	)	$	106,800	$	80,197	$	68	$	(4	)	$	80,261

Total cash, cash equivalents and investments	$	428,608	$	166	$	(43	)	$	428,731	$	425,501	$	126	$	(9	)	$	425,618