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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
May 31, 2016
USD ($)
May 31, 2015
USD ($)
May 31, 2016
USD ($)
item
May 31, 2015
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable segments | item     3  
Net sales $ 96,446 $ 92,485 $ 283,518 $ 286,169
Income from operations 18,668 16,372 53,719 49,596
Depreciation and amortization expense 1,582 1,577 4,893 4,824
Interest income 186 113 517 425
Interest expense 433 343 1,222 912
Unallocated Corporate [Member]        
Segment Reporting Information [Line Items]        
Income from operations [1] (5,686) (5,737) (17,329) (17,137)
Depreciation and amortization expense [1] 8 7 23 23
Americas [Member]        
Segment Reporting Information [Line Items]        
Net sales 49,878 49,744 139,832 139,219
Income from operations 13,329 13,542 35,003 34,367
Depreciation and amortization expense 960 995 3,101 3,055
Interest income 1 1 4 6
Interest expense 429 341 1,212 906
EMEA [Member]        
Segment Reporting Information [Line Items]        
Net sales 32,922 30,335 100,634 103,605
Income from operations 7,150 6,195 23,278 21,830
Depreciation and amortization expense 543 509 1,567 1,564
Interest income 118 87 366 304
Asia-Pacific [Member]        
Segment Reporting Information [Line Items]        
Net sales 13,646 12,406 43,052 43,345
Income from operations 3,875 2,372 12,767 10,536
Depreciation and amortization expense 71 66 202 182
Interest income 67 25 147 115
Interest expense $ 4 $ 2 $ 10 $ 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.