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Deferred Compensation Plan - Additional Information (Detail) (USD $)
1 Months Ended
Jan. 31, 2009
Aug. 31, 2006
May 04, 2013
Feb. 02, 2013
Deferred Compensation Arrangement with Individual [Line Items]        
Deferred compensation plan, vesting percentage   100.00%    
Percentage of employer contribution based on the first 4% eligible employee contribution 50.00%      
Percentage of eligible contributions by employee 4.00%      
Deferred compensation plan, asset     $ 5,800,000 $ 5,200,000
Deferred compensation plan, liability     $ 6,089,000 $ 5,488,000
Base Salary Compensation
       
Deferred Compensation Arrangement with Individual [Line Items]        
Deferred compensation plan, eligible compensation for deferral percentage   80.00%    
Annual earned Bonus
       
Deferred Compensation Arrangement with Individual [Line Items]        
Deferred compensation plan, eligible compensation for deferral percentage   100.00%    
Earned cash fees
       
Deferred Compensation Arrangement with Individual [Line Items]        
Deferred compensation plan, eligible compensation for deferral percentage   100.00%