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Benefit Plans (Details) (USD $)
3 Months Ended 9 Months Ended
Nov. 02, 2013
Oct. 27, 2012
Nov. 02, 2013
Oct. 27, 2012
Compensation and Retirement Disclosure [Abstract]        
Employer contributions to pension plan $ 700,000   $ 2,100,000  
Expected employer contributions to pension plan for remainder of current fiscal year 700,000   700,000  
Components of net periodic benefit costs:        
Service cost 1,059,000 817,000 3,178,000 2,450,000
Interest cost 1,696,000 1,823,000 5,086,000 5,470,000
Net actuarial loss 753,000 1,283,000 2,259,000 3,849,000
Amortization of prior service cost 24,000 157,000 72,000 470,000
Plan curtailment gain 0 0 (1,480,000) 0
Net periodic benefit costs $ 3,532,000 $ 4,080,000 $ 9,115,000 $ 12,239,000