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Long-Term Performance Share Bonus Plan - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Mar. 16, 2011
Jan. 29, 2011
Jan. 29, 2011
First Tranche
Jan. 29, 2011
Second Tranche
Jan. 29, 2011
Third Tranche
Feb. 02, 2013
Long Term Incentive Plan
Stock Options And Restricted Shares
Minimum
Jan. 28, 2012
Long Term Incentive Plan
Stock Options And Restricted Shares
Minimum
Jan. 29, 2011
Long Term Incentive Plan
Stock Options And Restricted Shares
Minimum
Feb. 02, 2013
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Minimum
Jan. 28, 2012
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Minimum
Jan. 29, 2011
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Minimum
Feb. 02, 2013
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Maximum
Jan. 28, 2012
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Maximum
Jan. 29, 2011
Long Term Incentive Plan
Twenty Zero Six Incentive Compensation Plan
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Percentage of financial targets to be achieved for participants to receive award                 90.00% 90.00% 85.00% 120.00% 120.00% 125.00%
Percentage of target cash value participant receive upon achievement of financial targets                 50.00% 50.00% 80.00% 150.00% 150.00% 150.00%
Percentage of award equity participants should elect to receive through either shares of restricted stock and/or stock options           50.00% 50.00% 50.00%            
Percentage of adjusted EBITDA target achieved   103.50%                        
Percentage of operating margin target achieved   103.30%                        
Weighted average payout percent   106.00%                        
Cash awards granted $ 1.9                          
Equity awards granted 2.4                          
Equity awards, restricted stock 538,661                          
Equity awards of options to purchase common stock 72,578                          
Award vesting Period     Mar. 16, 2012 Mar. 16, 2013 Mar. 16, 2014                  
Recognized compensation expense   1.1                        
Compensation expense   4.3                        
Compensation expense included in additional paid-in capital as stock-based compensation   $ 0.7