Quarterly report pursuant to Section 13 or 15(d)

Guarantor Subsidiaries (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details)

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Guarantor Subsidiaries (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Feb. 29, 2012
Feb. 28, 2011
Guarantor Obligations [Line Items]    
Net cash provided by (used in) operating activities $ 52,001 $ 20,296
Proceeds from sale of property, plant and equipment 7,775 266
Proceeds from sale of businesses, net of transaction costs   3,463
Capital expenditures (10,452) (8,291)
Business acquisitions, net of cash acquired (18,907) (158,533)
Net cash used in investing activities (21,584) (163,095)
Net borrowings on revolving credit facilities (167) 41,169
Issuance of term loans   100,000
Repurchases of 2% Convertible Notes   (34)
Debt issuance costs   (5,197)
Purchase of treasury shares (20,410)  
Stock option exercises and related tax benefits 5,507 6,813
Cash dividends (2,748) (2,716)
Net cash (used in) provided by financing activities (17,818) 140,035
Effect of exchange rate changes on cash 1,625 2,942
Net increase in cash and cash equivalents 14,224 178
Cash and cash equivalents - beginning of period 44,221 40,222
Cash and cash equivalents - end of period 58,445 40,400
Interest rate on Convertible Notes 2.00% 2.00%
Parent [Member]
    
Guarantor Obligations [Line Items]    
Net cash provided by (used in) operating activities (495) (35,738)
Proceeds from sale of property, plant and equipment 1,541  
Capital expenditures (3,142) (1,741)
Business acquisitions, net of cash acquired (290)  
Net cash used in investing activities (1,891) (1,741)
Net borrowings on revolving credit facilities 10 40,000
Issuance of term loans   100,000
Intercompany loan activity 24,565 (102,640)
Repurchases of 2% Convertible Notes   (34)
Debt issuance costs   (5,197)
Purchase of treasury shares (20,410)  
Stock option exercises and related tax benefits 5,507 6,813
Cash dividends (2,748) (2,716)
Net cash (used in) provided by financing activities 6,924 36,226
Effect of exchange rate changes on cash     
Net increase in cash and cash equivalents 4,538 (1,253)
Cash and cash equivalents - beginning of period 872 5,055
Cash and cash equivalents - end of period 5,410 3,802
Interest rate on Convertible Notes 2.00% 2.00%
Guarantors [Member]
    
Guarantor Obligations [Line Items]    
Net cash provided by (used in) operating activities 12,656 (9,378)
Proceeds from sale of property, plant and equipment 113 176
Capital expenditures (1,699) (2,180)
Business acquisitions, net of cash acquired    (350)
Net cash used in investing activities (1,586) (2,354)
Net borrowings on revolving credit facilities     
Intercompany loan activity (11,070) 11,732
Purchase of treasury shares     
Stock option exercises and related tax benefits     
Cash dividends     
Net cash (used in) provided by financing activities (11,070) 11,732
Effect of exchange rate changes on cash     
Net increase in cash and cash equivalents     
Cash and cash equivalents - beginning of period     
Cash and cash equivalents - end of period     
Interest rate on Convertible Notes 2.00% 2.00%
Non-Guarantors [Member]
    
Guarantor Obligations [Line Items]    
Net cash provided by (used in) operating activities 39,840 66,945
Proceeds from sale of property, plant and equipment 6,121 90
Proceeds from sale of businesses, net of transaction costs   3,463
Capital expenditures (5,611) (4,370)
Business acquisitions, net of cash acquired (18,617) (158,183)
Net cash used in investing activities (18,107) (159,000)
Net borrowings on revolving credit facilities (177) 1,169
Intercompany loan activity (13,495) 90,908
Purchase of treasury shares     
Stock option exercises and related tax benefits     
Cash dividends    (1,533)
Net cash (used in) provided by financing activities (13,672) 90,544
Effect of exchange rate changes on cash 1,625 2,942
Net increase in cash and cash equivalents 9,686 1,431
Cash and cash equivalents - beginning of period 43,349 35,167
Cash and cash equivalents - end of period 53,035 36,598
Interest rate on Convertible Notes 2.00% 2.00%
Eliminations [Member]
    
Guarantor Obligations [Line Items]    
Net cash provided by (used in) operating activities    (1,533)
Proceeds from sale of property, plant and equipment     
Capital expenditures     
Business acquisitions, net of cash acquired     
Net cash used in investing activities     
Net borrowings on revolving credit facilities     
Intercompany loan activity     
Purchase of treasury shares     
Stock option exercises and related tax benefits     
Cash dividends    1,533
Net cash (used in) provided by financing activities    1,533
Effect of exchange rate changes on cash     
Net increase in cash and cash equivalents     
Cash and cash equivalents - beginning of period     
Cash and cash equivalents - end of period     
Interest rate on Convertible Notes 2.00% 2.00%