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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 3 Months Ended
Nov. 30, 2017
USD ($)
item
Nov. 30, 2016
USD ($)
Segment Reporting Information [Line Items]    
Number of reportable segments | item 3  
Net sales $ 97,597 $ 89,248
Income from operations 17,136 16,516
Depreciation and amortization expense 1,917 1,620
Interest income 133 147
Interest expense 841 531
Unallocated Corporate [Member]    
Segment Reporting Information [Line Items]    
Income from operations [1] (6,350) (6,397)
Depreciation and amortization expense [1] 192 8
Americas Segment [Member]    
Segment Reporting Information [Line Items]    
Net sales 46,163 42,840
Income from operations 11,030 10,749
Depreciation and amortization expense 1,094 1,049
Interest income 1 2
Interest expense 839 527
EMEA Segments [Member]    
Segment Reporting Information [Line Items]    
Net sales 35,028 30,257
Income from operations 7,836 7,178
Depreciation and amortization expense 559 501
Interest income 119 80
Asia-Pacific Segment [Member]    
Segment Reporting Information [Line Items]    
Net sales 16,406 16,151
Income from operations 4,620 4,986
Depreciation and amortization expense 72 62
Interest income 13 65
Interest expense $ 2 $ 4
[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.