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Restricted Stock (Details) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 14, 2012
Nov. 30, 2011
Jun. 30, 2011
Apr. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Nov. 18, 2012
Jun. 13, 2012
Employees
Nov. 18, 2011
Jun. 15, 2011
Employees
Mar. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation             $ 1,677,000 $ 2,175,000          
Document Period End Date         Jul. 28, 2012                
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized         1,566,000   1,566,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             3 years            
Restricted Stock [Member]
                         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation 50,000       347,000 453,000 1,012,000 607,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized         908,000   908,000            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term         0 years 9 months 18 days                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value             598,000 316,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   453,000 50,000 522,000     50,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       1 year         2 years        
Share Based Compensation Arrangement by Share Based Payment Award Equity Intstrument Other than Options Aggregate Value                   $ 85,000 $ 816,000 $ 377,000 $ 3,323,000
Share Based Compensation Arrangement by Share Based Payment Award Number of Non Management Board Members Granted Shares                   6   7