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Business Segments and Foreign Operations (Summarized Information Of Reportable Segments) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
May. 31, 2015
USD ($)
May. 31, 2014
USD ($)
May. 31, 2015
USD ($)
item
May. 31, 2014
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable segments | item     3  
Net sales $ 92,485 $ 95,650 $ 286,169 $ 285,375
Income from operations 16,372 15,103 49,596 47,122
Depreciation and amortization expense 1,577 1,488 4,824 4,337
Interest income 113 136 425 425
Interest expense 343 268 912 709
Unallocated Corporate [Member]        
Segment Reporting Information [Line Items]        
Income from operations [1] (5,737) (4,758) (17,137) (16,016)
Depreciation and amortization expense [1] 7 5 23 20
Americas [Member]        
Segment Reporting Information [Line Items]        
Net sales 49,744 45,096 139,219 134,366
Income from operations 13,542 9,991 34,367 29,893
Depreciation and amortization expense 995 1,035 3,055 3,193
Interest income 1 3 6 5
Interest expense 341 266 906 702
EMEA [Member]        
Segment Reporting Information [Line Items]        
Net sales 30,335 36,678 103,605 111,305
Income from operations 6,195 7,306 21,830 24,740
Depreciation and amortization expense 509 384 1,564 947
Interest income 87 104 304 318
Asia-Pacific [Member]        
Segment Reporting Information [Line Items]        
Net sales 12,406 13,876 43,345 39,704
Income from operations 2,372 2,564 10,536 8,505
Depreciation and amortization expense 66 64 182 177
Interest income 25 29 115 102
Interest expense $ 2 $ 2 $ 6 $ 7
[1] Unallocated corporate expenses are general corporate overhead expenses not directly attributable to any one of the operating segments. These expenses are reported separate from the Company's identified segments and are included in Selling, General and Administrative expenses on the Company's condensed consolidated statements of operations.