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Capital Stock and Share-Based Employee Compensation (Details) (USD $)
12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Jun. 01, 2010
Jun. 05, 2012
Directors' Plan [Member]
Jun. 05, 2012
SIP 2003 [Member]
Jun. 05, 2012
SIP 1996 [Member]
Jun. 05, 2012
Certain Employees [Member]
SIP 2003 [Member]
Jun. 05, 2012
Stock Options [Member]
May 31, 2011
Stock Options [Member]
Jun. 01, 2010
Stock Options [Member]
Jun. 05, 2012
Stock Options [Member]
SIP 2003 [Member]
Jun. 05, 2012
Stock Options [Member]
SIP 1996 [Member]
Aug. 30, 2011
Stock Options [Member]
Chief Executive Officer [Member]
Aug. 31, 2010
Stock Options [Member]
Chief Executive Officer [Member]
Sep. 01, 2009
Stock Options [Member]
Chief Executive Officer [Member]
Jun. 05, 2012
Stock Options [Member]
Non-Employee Directors [Member]
Directors' Plan [Member]
Jun. 05, 2012
Service-based Restricted Shares [Member]
Jun. 05, 2012
Service-based Restricted Shares [Member]
Non-Employee Directors [Member]
May 31, 2011
Service-based Restricted Shares [Member]
Non-Employee Directors [Member]
Jun. 01, 2010
Service-based Restricted Shares [Member]
Non-Employee Directors [Member]
Jun. 05, 2012
Service-based Restricted Shares [Member]
Non-Employee Directors [Member]
Directors' Plan [Member]
Jun. 05, 2012
Stock Options Awarded in 2011 and 2010 [Member]
Jun. 05, 2012
Service Based Deferred Compensation [Member]
Service-based Restricted Shares [Member]
May 31, 2011
Service Based Deferred Compensation [Member]
Service-based Restricted Shares [Member]
Jun. 01, 2010
Service Based Deferred Compensation [Member]
Service-based Restricted Shares [Member]
Aug. 30, 2011
Service Based Deferred Compensation [Member]
Service-based Restricted Shares [Member]
SIP 2003 [Member]
May 31, 2011
Service Based Deferred Compensation [Member]
Service-based Restricted Shares [Member]
SIP 1996 [Member]
Aug. 30, 2011
Performance Based - Incentive [Member]
Stock Options [Member]
Chief Executive Officer [Member]
Jun. 05, 2012
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Aug. 31, 2010
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Jun. 05, 2012
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
May 31, 2011
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Jun. 01, 2010
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Jun. 05, 2012
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Chief Executive Officer [Member]
May 31, 2011
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Chief Executive Officer [Member]
Jun. 01, 2010
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Chief Executive Officer [Member]
Jun. 01, 2010
Performance Based - Incentive [Member]
Service-based Restricted Shares [Member]
Certain Employees [Member]
Jun. 05, 2012
Preferred Stock [Member]
Jun. 01, 2010
Common Stock [Member]
Class of Stock [Line Items]                                                                          
Preferred stock, shares authorized (in shares)                                                                       250,000  
Preferred stock, par value (in dollars per share)                                                                       $ 0.01  
Common stock, shares issued (in shares) 11,500,000                                                                       11,500,000
Common stock, share price (in dollars per share)                                                                         $ 6.75
Shares Sold In Connection With Exercise Of Over- Allotment Option Granted To Underwriters                                                                         1,500,000
Net proceeds from sale of shares, after deducting underwriting discounts and offering expenses $ 73,125,000                                                                       $ 73,100,000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                                          
Vesting period of share-based compensation arrangement                           after 30 months   in three equal installments over a three-year period     after one, two, and three years over a three-year period   over a three-year period         threeequal installments over periods ranging from the grant date through October 2015, 2016, and 2017                    
Vesting period of restricted shares issued and options granted, maximum (in years)                 3 3                                                      
Exercisable period of options issued                           5 years                                              
Reserved shares of common stock under the Plan (in shares)   111,000 4,869,000 998,000                                                                  
Reserved shares of common stock subject to options outstanding under the plan (in shares)   47,000 1,713,000 956,000                                                                  
Common stock currently available for issuance (in shares)   64,000 3,156,000 42,000                                                                  
Expiration date of share-based payment awards                 five or seven (but some up to 10) years after grant five or seven (but some up to 10) years after grant                                                      
Options, outstanding [Roll forward]                                                                          
Beginning balance (in shares)           3,239,000 4,046,000 4,802,000                                                          
Granted (in shares)           253,000 927,000 622,000                                                          
Exercised (in shares)           (61,000) (249,000) 0                                                          
Forfeited (in shares)           (715,000) (1,485,000) (1,378,000)                                                          
Ending balance (in shares)           2,716,000 3,239,000 4,046,000                                                          
Exercisable at end of period (in shares)           2,283,000                                                              
Weighted average exercise price [Abstract]                                                                          
Beginning balance (in dollars per share)           $ 13.10 $ 19.70 $ 23.06                                                          
Granted (in dollars per share)           $ 7.87 $ 9.39 $ 6.58                                                          
Exercised (in dollars per share)           $ 5.82 $ 7.64 $ 0                                                          
Forfeited (in dollars per share)           $ 28.24 $ 29.70 $ 25.46                                                          
Ending balance (in dollars per share)           $ 8.79 $ 13.10 $ 19.70                                                          
Exercisable at end of period (in dollars per share)           $ 8.79                                                              
Options, weighted average remaining contractual term [Abstract]                                                                          
Weighted average contractual term (in years)           3.48                                                              
Exercisable (in years)           3.09                                                              
Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract]                                                                          
Ending balance           197,000                                                              
Exercisable           197,000                                                              
Options exercised during period, total intrinsic value           100,000 1,500,000                                                            
Out-of-the money options included in outstanding balance (in shares)           2,100,000                                                              
Out Of Money Options Included In Outstanding Balance expect to be expired           202,000                                                              
Unrecognized pre-tax compensation expense related to share based compensation           200,000                 3,800,000                                            
Unrecognized pre-tax compensation expense expected to be recognized over a weighted average period (in years)           1.0                 2.8                                            
Share Based Compensation Arrangement By Share Based Payment Options Vested In Period Total Fair Value           5,500,000 4,400,000 5,200,000                                                          
Life Of Share Based Payment Award Maximum                                       7                                  
Expensed related to stock options awarded to CEO                     1,200,000 2,300,000 1,200,000                                                
Weighted average fair value at date of grant for options granted (in dollars per share)           $ 4.60 $ 5.42 $ 3.69                                                          
Fair value assumptions used in estimating option grants [Abstract]                                                                          
Risk-free interest rate (in hundredths)           0.80% 1.52% 2.20%                                                          
Expected dividend yield (in hundredths)           0.00% 0.00% 0.00%                                                          
Expected stock price volatility (in hundredths)           75.63% 73.36% 69.45%                                                          
Expected life (in years)           4.50 4.50 4.50                                                          
Restricted stock activity, shares [Roll forward]                                                                          
Non-vested at beginning of year (in shares)                                         551,000 427,000 208,000         721,000 299,000 721,000 1,195,000            
Granted (in shares)                               88,000 61,000 97,000     495,000 235,000 299,000 186,000 174,000       384,000 0 348,000       201,000    
Vested (in shares)         221,000                               (248,000) (111,000) (78,000)         559,000 (260,000) (421,000) (186,000) 203,000          
Forfeited (in shares)                                         (1,000) 0 (2,000)         636,000 0 (1,000) (636,000)            
Non-vested at end of year (in shares)                                         797,000 551,000 427,000       423,000   423,000 299,000 721,000            
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Weighted Average Fair Value [Abstract]                                                                          
Non-vested at beginning of year (in dollars per share)                                         $ 8.22 $ 7.42 $ 8.97         $ 7.13 $ 7.24 $ 7.13 $ 7.64            
Granted (in dollars per share)                                         $ 8.30 $ 10.21 $ 7.01           $ 7.87 $ 0 $ 6.58            
Vested (in dollars per share)                                         $ 7.89 $ 9.39 $ 9.99           $ 7.33 $ 7.05 $ 7.64            
Forfeited (in dollars per share)                                         $ 9.39 $ 0 $ 7.63           $ 0 $ 7.82 $ 7.64            
Non-vested at end of year (in dollars per share)                                         $ 8.37 $ 8.22 $ 7.42       $ 7.75   $ 7.75 $ 7.24 $ 7.13            
Shares of common stock awarded to retirement-eligible CEO (in shares)                                                                 124,000 177,000      
Recognized expense on the grant date of common stock award to retirement-eligible CEO                                                   $ 700,000             $ 1,200,000 $ 1,200,000