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SHORT-TERM INVESTMENTS
 9 Months Ended
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]  
SHORT-TERM INVESTMENTS
SHORT-TERM INVESTMENTS
Our short-term investments consisted of the following:
 
December 31, 2017
 
 
 
Gross
Unrealized
 
 
 
Cost or
Amortized Cost
 
Gains
 
Losses
 
Fair Value
Short-term investments
 

 
 

 
 

 
 

Bank time deposits
$
166,321

 
$
—

 
$
—

 
$
166,321

Available-for-sale securities:
 

 
 

 
 

 
 

Corporate bonds
363,127

 
18

 
(729
)
 
362,416

Commercial paper
13,921

 
—

 
—

 
13,921

Mutual funds
4,665

 
15

 
(9
)
 
4,671

Total short-term investments
$
548,034

 
$
33

 
$
(738
)
 
$
547,329

 
 
 
March 31, 2017
 
 
 
Gross
Unrealized
 
 
 
Cost or
Amortized Cost
 
Gains
 
Losses
 
Fair Value
Short-term investments
 

 
 

 
 

 
 

Bank time deposits
$
175,745

 
$
—

 
$
—

 
$
175,745

Available-for-sale securities:
 

 
 

 
 

 
 

Corporate bonds
243,140

 
98

 
(219
)
 
243,019

Commercial paper
25,938

 
5

 
(7
)
 
25,936

Mutual funds
4,118

 
123

 
(9
)
 
4,232

Total short-term investments
$
448,941

 
$
226

 
$
(235
)
 
$
448,932


Based on our review of investments with unrealized losses, we did not consider these investments to be other-than-temporarily impaired as of December 31, 2017 or March 31, 2017.
The following table summarizes the contracted maturities of our short-term investments at December 31, 2017:
 
December 31, 2017
 
Amortized
Cost
 
Fair
Value
Short-term investments
 

 
 

Due in 1 year or less
$
371,567

 
$
371,489

Due in 1 - 2 years
176,467

 
175,840

Total short-term investments
$
548,034

 
$
547,329