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Investments (Tables)
 6 Months Ended
Jul. 30, 2016
Investments [Abstract]  
Investments
The following table discloses the major categories of the Company's investments as of the dates presented:
 
Short-term investments
 
Long-term investments
 
July 30, 2016
 
January 30, 2016
 
August 1, 2015
 
July 30, 2016
 
January 30, 2016
 
August 1, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
(in thousands)
Available-for-sale securities:
 
 
 
 
 
 
 
 
 
 
 
Carrying value
$
103,051

 
$
225,985

 
$
140,778

 
$
78,068

 
$
72,153

 
$
179,659

Unrealized gains included in accumulated other comprehensive loss
455

 
477

 
91

 
33

 
22

 
14

Unrealized losses included in accumulated other comprehensive loss
(39
)
 
(435
)
 
(48
)
 
(200
)
 
(222
)
 
(368
)
Total investments
$
103,467

 
$
226,027

 
$
140,821

 
$
77,901

 
$
71,953

 
$
179,305