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Defined Benefit Plans (Tables)
 6 Months Ended
Aug. 01, 2015
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic defined benefit pension (credit) cost
The components of net periodic defined benefit pension (credit) cost for the three and six months ended August 1, 2015 and August 2, 2014 related to the SERP are as follows (in thousands):    
 
Three Months Ended
 
Six Months Ended
 
Aug 1, 2015
 
Aug 2, 2014
 
Aug 1, 2015
 
Aug 2, 2014
Interest cost
$
495

 
$
572

 
$
991

 
$
1,144

Net amortization of unrecognized prior service credit
(39
)
 
(58
)
 
(97
)
 
(116
)
Net amortization of actuarial losses
290

 
235

 
718

 
469

Curtailment gain
(1,651
)
 
—

 
(1,651
)
 
—

Net periodic defined benefit pension (credit) cost
$
(905
)
 
$
749

 
$
(39
)
 
$
1,497