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Investments (Tables)
 3 Months Ended
May 02, 2015
Investments [Abstract]  
Investments
The following table discloses the major categories of the Company's investments as of the periods presented:
 
Short-term investments
 
Long-term investments
 
May 2, 2015
 
January 31, 2015
 
May 3, 2014
 
May 2, 2015
 
January 31, 2015
 
May 3, 2014
 
 
 
 
 
 
 
 
 
 
 
 
 
(in thousands)
Available-for-sale securities:
 
 
 
 
 
 
 
 
 
 
 
Amortized cost basis
$
128,779

 
$
17,147

 
—

 
$
121,011

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
 
Gains recognized in accumulated other comprehensive income
38

 
—

 
—

 
38

 
—

 
—

Losses recognized in accumulated other comprehensive loss
(112
)
 
—

 
—

 
(325
)
 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
 
Held-to-maturity securities:
 
 
 
 
 
 
 
 
 
 
 
Amortized cost basis
—

 
154,054

 
$
179,877

 
—

 
$
216,756

 
$
235,411

Total investments
$
128,705

 
$
171,201

 
$
179,877

 
$
120,724

 
$
216,756

 
$
235,411

 
 
 
 
 
 
 
 
 
 
 
 
Gross holding gains on held-to-maturity securities
—

 
$
117

 
$
107

 
—

 
$
371

 
$
575

Gross holding losses on held-to-maturity securities
—

 
(50
)
 
(56
)
 
—

 
(317
)
 
(269
)
Fair value of securities
$
128,705

 
$
171,268

 
$
179,928

 
$
120,724

 
$
216,810

 
$
235,717