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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 12 Months Ended
Aug. 31, 2016
USD ($)
item
Aug. 31, 2015
USD ($)
Aug. 31, 2014
USD ($)
Segment Reporting Information [Line Items]      
Number of reportable segments | item 3    
Net sales $ 380,670 $ 378,150 $ 382,997
Income from operations 71,348 65,390 63,737
Depreciation and amortization expense 6,465 6,464 5,860
Interest income 683 584 596
Interest expense 1,703 1,205 1,002
Unallocated Corporate [Member]      
Segment Reporting Information [Line Items]      
Income from operations [1] (23,920) (24,059) (21,986)
Depreciation and amortization expense [1] 30 31 24
Americas [Member]      
Segment Reporting Information [Line Items]      
Net sales 191,397 187,344 180,806
Income from operations 48,404 46,674 41,356
Depreciation and amortization expense 4,071 4,078 4,229
Interest income 5 9 7
Interest expense 1,689 1,197 994
EMEA [Member]      
Segment Reporting Information [Line Items]      
Net sales 135,235 136,847 151,368
Income from operations 31,702 30,173 34,003
Depreciation and amortization expense 2,084 2,102 1,363
Interest income 485 417 417
Asia-Pacific [Member]      
Segment Reporting Information [Line Items]      
Net sales 54,038 53,959 50,823
Income from operations 15,162 12,602 10,364
Depreciation and amortization expense 280 253 244
Interest income 193 158 172
Interest expense $ 14 $ 8 $ 8
[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 consolidated statements of operations.