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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
USD ($)
item
Aug. 31, 2016
USD ($)
Aug. 31, 2015
USD ($)
Segment Reporting Information [Line Items]      
Number of reportable segments | item 3    
Net sales $ 380,506 $ 380,670 $ 378,150
Income from operations 75,909 71,348 65,390
Depreciation and amortization expense 6,769 6,465 6,464
Interest income 508 683 584
Interest expense 2,582 1,703 1,205
Unallocated Corporate [Member]      
Segment Reporting Information [Line Items]      
Income from operations [1] (24,548) (23,920) (24,059)
Depreciation and amortization expense [1] 155 30 31
Americas [Member]      
Segment Reporting Information [Line Items]      
Net sales 184,929 191,397 187,344
Income from operations 48,303 48,404 46,674
Depreciation and amortization expense 4,270 4,071 4,078
Interest income 8 5 9
Interest expense 2,570 1,689 1,197
EMEA [Member]      
Segment Reporting Information [Line Items]      
Net sales 136,771 135,235 136,847
Income from operations 35,389 31,702 30,173
Depreciation and amortization expense 2,090 2,084 2,102
Interest income 389 485 417
Asia-Pacific [Member]      
Segment Reporting Information [Line Items]      
Net sales 58,806 54,038 53,959
Income from operations 16,765 15,162 12,602
Depreciation and amortization expense 254 280 253
Interest income 111 193 158
Interest expense $ 12 $ 14 $ 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.