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Business Combinations (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended
Aug. 31, 2013
Sep. 01, 2012
Aug. 31, 2013
BDNA [Member]
Feb. 22, 2013
BDNA [Member]
Aug. 31, 2013
BDNA [Member]
Customer Relationships [Member]
Jan. 31, 2012
ATS Industrial Supply, Inc. [Member]
Aug. 27, 2011
American Tool Supply Inc. And American Specialty Grinding Co., Inc. [Member]
Jul. 18, 2011
American Tool Supply Inc. And American Specialty Grinding Co., Inc. [Member]
Business Acquisition [Line Items]                
Purchase price       $ 547,335   $ 32,204 $ 28,948  
Non-recurring transaction and integration costs     11,590          
Percent of shares acquired               100.00%
Acquired intangible assets     117,400   107,000      
Indefinite lived tradename     7,500          
Finite lived tradename     2,900          
Useful life of acquired intangibles     5 years   18 years      
Goodwill     342,000          
Goodwill amortization period     15 years          
Post-closing working capital adjustment     1,434       1,247  
Revenue 2,642,720 2,664,086 108,376          
Earnings 242,966 260,895 4,474          
Cash acquired             942  
Total Assets Acquired     $ 567,609