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11. Employee Benefit Plans (Details) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 30, 2016
Oct. 30, 2016
Feb. 02, 2016
Jan. 31, 2016
11. Employee Benefit Plans (Details) [Line Items]        
Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Current $ 15,600,000 $ 15,600,000   $ 8,200,000
Deferred Compensation Liability, Classified, Noncurrent 10,655,000 10,655,000   $ 8,409,000
Pension Plan [Member]        
11. Employee Benefit Plans (Details) [Line Items]        
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate     7.00%  
Defined Benefit Plan, Contributions by Employer   438,000    
Defined Benefit Plan, Expected Contributions in Current Fiscal Year   146,000    
Underfunded Balance of the Pension Plan [Member]        
11. Employee Benefit Plans (Details) [Line Items]        
Defined Benefit Plan, Contributions by Employer 1,200,000      
Supplemental Retirement Income Plan ("SRIP") and Supplemental Executive Retirement Plan ("SERP") [Member]        
11. Employee Benefit Plans (Details) [Line Items]        
Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year $ 150,000 $ 150,000