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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 28, 2017
USD ($)
Feb. 29, 2016
USD ($)
Feb. 28, 2017
USD ($)
item
Feb. 29, 2016
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable segments | item     3  
Net sales $ 96,519 $ 94,550 $ 185,767 $ 187,072
Income from operations 18,862 17,906 35,378 35,051
Depreciation and amortization expense 1,678 1,650 3,298 3,311
Interest income 133 183 280 331
Interest expense 598 417 1,129 789
Unallocated Corporate [Member]        
Segment Reporting Information [Line Items]        
Income from operations [1] (6,760) (6,090) (13,157) (11,643)
Depreciation and amortization expense [1] 10 8 18 15
Americas [Member]        
Segment Reporting Information [Line Items]        
Net sales 45,078 45,542 87,918 89,954
Income from operations 10,710 10,814 21,459 21,674
Depreciation and amortization expense 1,090 1,061 2,139 2,141
Interest income 2 1 4 3
Interest expense 595 414 1,122 783
EMEA [Member]        
Segment Reporting Information [Line Items]        
Net sales 36,205 35,626 66,462 67,712
Income from operations 10,327 9,413 17,505 16,128
Depreciation and amortization expense 517 514 1,018 1,024
Interest income 109 145 189 248
Asia-Pacific [Member]        
Segment Reporting Information [Line Items]        
Net sales 15,236 13,382 31,387 29,406
Income from operations 4,585 3,769 9,571 8,892
Depreciation and amortization expense 61 67 123 131
Interest income 22 37 87 80
Interest expense $ 3 $ 3 $ 7 $ 6
[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.