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Restructuring And Other Expense (Income) (Schedule Of Progression Of Liabilities Created As Part Of The Plan, Combined With A Reconciliation To The Restructuring And Other Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Nov. 30, 2011
Nov. 30, 2010
Nov. 30, 2011
Nov. 30, 2010
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     $ 7,629  
Expense/(Income)     7,925  
Payments     (10,842)  
Adjustments     1,634  
Ending Balance 6,346   6,346  
Net gain on sale of assets     (2,151)  
Total restructuring charges     5,774  
Joint venture transactions 1,192   (2,023)  
Restructuring and other expense 2,048 (76) 3,751 988
Facility Exit And Other Costs [Member]
       
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     409  
Expense/(Income)     5,181  
Payments     (5,215)  
Adjustments     33  
Ending Balance 408   408  
Early Retirement And Severance [Member]
       
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     7,220  
Expense/(Income)     (1,041)  
Payments     (2,577)  
Adjustments     1,588  
Ending Balance 5,190   5,190  
Professional Fees [Member]
       
Restructuring Cost and Reserve [Line Items]        
Expense/(Income)     3,785  
Payments     (3,050)  
Adjustments     13  
Ending Balance $ 748   $ 748