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INCOME TAXES - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2015
Nov. 01, 2014
Oct. 31, 2015
Nov. 01, 2014
May. 02, 2015
Valuation Allowance [Line Items]          
Deferred tax benefit related to release of foreign valuation allowance         $ 7.2
Deferred tax benefit related to release of state valuation allowance         1.4
Federal tax expense (benefit)     $ (0.7)    
State tax expense (benefit)     (3.8)    
Foreign tax credit carryforward $ 3.7   3.7    
Income tax expense $ 5.7 $ 8.7 $ 13.1 $ 15.7  
Effective income tax rate 21.20% 25.10% 22.70% 24.90%  
Unrecognized tax benefits, income tax penalties and interest accrued $ 0.1   $ 0.1    
Total unrecognized tax benefit $ 0.9   0.9    
Unrecognized tax benefit recorded     $ 0.1    
Malta | Investment Tax Credit Carryforward          
Valuation Allowance [Line Items]          
Investment tax credit on qualified expenditures, percent 30.00%   30.00%    
Unused credits $ 16.1   $ 16.1    
Federal          
Valuation Allowance [Line Items]          
Operating loss carryforwards 2.1   2.1    
State          
Valuation Allowance [Line Items]          
Operating loss carryforwards 80.6   80.6    
Domestic federal and state          
Valuation Allowance [Line Items]          
Valuation allowances against deferred tax assets $ 1.2   $ 1.2   $ 1.2