Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Statements of Cash Flows (Detail)

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Condensed Consolidating Statements of Cash Flows (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Operating Activities    
Net cash provided by (used in) operating activities $ 12,275 $ 20,475
Investing Activities    
Proceeds from sale of property, plant and equipment 977 5,918
Capital expenditures (7,689) (5,595)
Business acquisitions, net of cash acquired (83) (290)
Cash (used in) provided by investing activities (6,795) 33
Financing Activities    
Principal repayment of term loans (1,250)  
Net borrowings on revolver and other debt   4,809
Purchase of treasury shares (7,142) (20,410)
Stock option exercises and related tax benefits 5,473 2,782
Cash dividend (2,911) (2,748)
Net cash used in financing activities (5,830) (15,567)
Effect of exchange rate changes on cash 477 (1,043)
Net (decrease) increase in cash and cash equivalents 127 3,898
Cash and cash equivalents - beginning of period 68,184 44,221
Cash and cash equivalents - end of period 68,311 48,119
Parent
    
Operating Activities    
Net cash provided by (used in) operating activities (658) (10,089)
Investing Activities    
Proceeds from sale of property, plant and equipment 571  
Capital expenditures (399) (2,206)
Business acquisitions, net of cash acquired   (290)
Cash (used in) provided by investing activities 172 (2,496)
Financing Activities    
Principal repayment of term loans (1,250)  
Net borrowings on revolver and other debt   4,700
Intercompany loan activity (4,991) 28,060
Purchase of treasury shares (7,142) (20,410)
Stock option exercises and related tax benefits 5,473 2,782
Cash dividend (2,911) (2,748)
Net cash used in financing activities (10,821) 12,384
Net (decrease) increase in cash and cash equivalents (11,307) (201)
Cash and cash equivalents - beginning of period 12,401 872
Cash and cash equivalents - end of period 1,094 671
Guarantors
    
Operating Activities    
Net cash provided by (used in) operating activities 4,779 7,121
Investing Activities    
Proceeds from sale of property, plant and equipment 14 68
Capital expenditures (1,291) (571)
Cash (used in) provided by investing activities (1,277) (503)
Financing Activities    
Intercompany loan activity (3,593) (6,618)
Net cash used in financing activities (3,593) (6,618)
Net (decrease) increase in cash and cash equivalents (91)  
Cash and cash equivalents - beginning of period 91  
Non-Guarantors
    
Operating Activities    
Net cash provided by (used in) operating activities 8,154 23,443
Investing Activities    
Proceeds from sale of property, plant and equipment 392 5,850
Capital expenditures (5,999) (2,818)
Business acquisitions, net of cash acquired (83)  
Cash (used in) provided by investing activities (5,690) 3,032
Financing Activities    
Net borrowings on revolver and other debt   109
Intercompany loan activity 8,584 (21,442)
Net cash used in financing activities 8,584 (21,333)
Effect of exchange rate changes on cash 477 (1,043)
Net (decrease) increase in cash and cash equivalents 11,525 4,099
Cash and cash equivalents - beginning of period 55,692 43,349
Cash and cash equivalents - end of period $ 67,217 $ 47,448