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CASH, CASH EQUIVALENTS, AND INVESTMENTS (Tables)
 3 Months Ended
Jun. 30, 2013
CASH, CASH EQUIVALENTS AND INVESTMENTS [Abstract]  
Cash, Cash Equivalents, and Investments [Table Text Block]
The following table represents the Company’s cash, cash equivalents, and investments as of June 30, 2013 and March 31, 2013:

(in thousands)
 
June 30, 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
 
$
242,348

 
$
—

 
$
—

 
$
242,348

 
$
118,881

 
$
—

 
$
—

 
$
118,881

Cash equivalents
 
13,995

 
—

 
—

 
13,995

 
109,895

 
—

 
—

 
109,895

Total cash and cash equivalents
 
$
256,343

 
$
—

 
$
—

 
$
256,343

 
$
228,776

 
$
—

 
$
—

 
$
228,776

 
 


 


 


 


 


 


 


 


Short-term investments:
 


 


 


 


 


 


 


 


U.S. Treasury Bills and Government Agency Securities
 
$
37,465

 
$
9

 
$
(57
)
 
$
37,417

 
$
66,092

 
$
18

 
$
(3
)
 
$
66,107

Commercial paper
 
39,743

 
16

 
(1
)
 
39,758

 
15,670

 
9

 
—

 
15,679

Corporate bonds
 
24,419

 
18

 
(2
)
 
24,435

 
34,766

 
31

 
(2
)
 
34,795

Total short-term investments
 
$
101,627

 
$
43

 
$
(60
)
 
$
101,610

 
$
116,528

 
$
58

 
$
(5
)
 
$
116,581

 
 


 


 


 


 


 


 


 


Long-term investments:
 


 


 


 


 


 


 


 


U.S. Treasury Bills and Government Agency Securities
 
$
42,892

 
$
19

 
$
(10
)
 
$
42,901

 
$
55,317

 
$
42

 
$
(1
)
 
$
55,358

Corporate bonds
 
42,089

 
12

 
(102
)
 
41,999

 
23,878

 
23

 
(3
)
 
23,898

Certificates of deposit ("CDs")
 
1,002

 
2

 
—

 
1,004

 
1,002

 
3

 
—

 
1,005

Total long-term investments
 
$
85,983

 
$
33

 
$
(112
)
 
$
85,904

 
$
80,197

 
$
68

 
$
(4
)
 
$
80,261

 
 

 

 

 

 

 

 

 

Total cash, cash equivalents and investments
 
$
443,953

 
$
76

 
$
(172
)
 
$
443,857

 
$
425,501

 
$
126

 
$
(9
)
 
$
425,618
Amortized Cost and Fair Value of Cash Equivalents, Short-Term Investments, and Long-Term Investments by Stated Maturity [Table Text Block]
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 June 30, 2013 and March 31, 2013:

(in thousands)
 
June 30, 2013
 
March 31, 2013
 
 
Amortized
Cost
 
Fair Value
 
Amortized
Cost
 
Fair Value
Due in 1 year or less
 
$
115,621


$
115,605

 
$
226,423


$
226,476

Due in 1 to 3 years
 
85,984


85,904

 
80,197


80,261

Total
 
$
201,605


$
201,509

 
$
306,620


$
306,737