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11. Employee Benefit Plans (Details) - USD ($)
 3 Months Ended 6 Months Ended
May 01, 2016
Jul. 31, 2016
Feb. 02, 2016
Jan. 31, 2016
11. Employee Benefit Plans (Details) [Line Items]        
Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Current   $ 16,800,000   $ 8,200,000
Deferred Compensation Liability, Classified, Noncurrent   10,677,000   $ 8,409,000
Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year   300,000    
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   $ 292,000    
Defined Benefit Plan, Expected Contributions in Current Fiscal Year $ 292,000