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Defined Benefit Plans (Tables)
3 Months Ended
Apr. 30, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Components of net periodic defined benefit pension cost
The components of net periodic defined benefit pension cost for the three months ended April 30, 2016 and May 2, 2015 related to the SERP are as follows (in thousands):    
 
Three Months Ended
 
Apr 30, 2016
 
May 2, 2015
Interest cost
$
460

 
$
496

Net amortization of unrecognized prior service credit

 
(58
)
Net amortization of actuarial losses
39

 
428

Net periodic defined benefit pension cost
$
499

 
$
866