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CASH, CASH EQUIVALENTS AND INVESTMENTS
 6 Months Ended
Sep. 30, 2012
CASH, CASH EQUIVALENTS AND INVESTMENTS [Abstract]  
Cash, Cash Equivalents and Investments [Text Block]
CASH, CASH EQUIVALENTS AND INVESTMENTS

The following table represents the Company’s cash, cash equivalents and investments as of September 30, 2012 and March 31, 2012:

(in thousands)
 
September 30, 2012
 
March 31, 2012
 
 
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
 
$
122,790

 
$
—

 
$
—

 
$
122,790

 
$
147,338

 
$
—

 
$
—

 
$
147,338

Cash equivalents
 
85,139

 
—

 
—

 
85,139

 
61,996

 
2

 
(1
)
 
61,997

Total Cash and cash equivalents
 
$
207,929

 
$
—

 
$
—

 
$
207,929

 
$
209,334

 
$
2

 
$
(1
)
 
$
209,335

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Short-term investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury Bills and Government Agency Securities
 
$
75,270

 
$
29

 
$
(4
)
 
$
75,295

 
$
61,898

 
$
22

 
$
(24
)
 
$
61,896

Commercial Paper
 
25,715

 
8

 
(2
)
 
25,721

 
20,041

 
1

 
(3
)
 
20,039

Corporate Bonds
 
46,535

 
66

 
—

 
46,601

 
38,300

 
60

 
(4
)
 
38,356

Certificates of Deposit ("CDs")
 
4,882

 
1

 
—

 
4,883

 
4,883

 
3

 
—

 
4,886

Total Short-term investments
 
$
152,402

 
$
104

 
$
(6
)
 
$
152,500

 
$
125,122

 
$
86

 
$
(31
)
 
$
125,177

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury Bills and Government Agency Securities
 
$
24,154

 
$
26

 
$
—

 
$
24,180

 
$
29,814

 
$
24

 
$
(1
)
 
$
29,837

Corporate Bonds
 
13,556

 
33

 
—

 
13,589

 
25,507

 
29

 
(26
)
 
25,510

CDs
 
1,003

 
3

 
—

 
1,006

 
—

 
—

 
—

 
—

Total Long-term investments
 
$
38,713

 
$
62

 
$
—

 
$
38,775

 
$
55,321

 
$
53

 
$
(27
)
 
$
55,347

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Cash, cash equivalents and investments
 
$
399,044

 
$
166

 
$
(6
)
 
$
399,204

 
$
389,777

 
$
141

 
$
(59
)
 
$
389,859



As of September 30, 2012 and March 31, 2012, all of the Company’s investments are classified as available-for-sale securities.  

The following table summarizes the amortized cost and fair value of the Company’s cash equivalents, short-term investments and long-term investments, classified by stated maturity as of September 30, 2012 and March 31, 2012:

(in thousands)
 
September 30, 2012
 
March 31, 2012
 
 
Amortized
Cost
 
Fair Value
 
Amortized
Cost
 
Fair Value
Due in 1 year or less
 
$
237,541

 
$
237,639

 
$
187,118

 
$
187,174

Due in 1 to 3 years
 
38,713

 
38,775

 
55,321

 
55,347

Total
 
$
276,254

 
$
276,414

 
$
242,439

 
$
242,521



The Company did not incur any material realized or unrealized net gains or losses in the three or six months ended September 30, 2012 or 2011.