Annual report pursuant to Section 13 and 15(d)

Changes in Projected Benefit Obligations, Fair Value of Plan Assets and Funded Status of Defined Benefit Pension Plans (Detail)

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Changes in Projected Benefit Obligations, Fair Value of Plan Assets and Funded Status of Defined Benefit Pension Plans (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Reconciliation of benefit obligations:      
Interest cost $ 2,146 $ 1,928 $ 2,162
Reconciliation of plan assets:      
Fair value of plan assets at beginning of year 34,054    
Fair value of plan assets at end of year 44,642 34,054  
U.S. defined benefit pension plans
     
Reconciliation of benefit obligations:      
Benefit obligation at beginning of year 45,046 50,870  
Adjustment 0 (280)  
Interest cost 2,146 1,928  
Actuarial (gain) loss 3,769 (4,983)  
Benefits paid (3,416) (2,489)  
Benefit obligation at end of year 47,545 45,046  
Reconciliation of plan assets:      
Fair value of plan assets at beginning of year 34,054 33,695  
Actual return on plan assets 5,180 2,252  
Company contributions 8,824 596  
Benefits paid from plan assets (3,416) (2,489)  
Fair value of plan assets at end of year 44,642 34,054  
Funded status of the plans (underfunded) $ (2,903) $ (10,992)