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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 12 Months Ended
Aug. 31, 2019
USD ($)
item
Aug. 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
Segment Reporting Information [Line Items]      
Number of reportable segments | item 3    
Net sales $ 423,350 $ 408,518 $ 380,506
Income from operations 82,382 78,604 75,909
Depreciation and amortization expense 7,593 7,800 6,769
Interest income 155 454 508
Interest expense 2,541 4,219 2,582
Unallocated Corporate [Member]      
Segment Reporting Information [Line Items]      
Income from operations [1] (25,746) (25,689) (24,548)
Depreciation and amortization expense [1] 241 784 155
Americas Segment [Member]      
Segment Reporting Information [Line Items]      
Net sales 193,972 192,878 184,929
Income from operations 50,069 48,954 48,303
Depreciation and amortization expense 4,532 4,142 4,270
Interest income 29 13 8
Interest expense 2,156 4,209 2,570
EMEA Segments [Member]      
Segment Reporting Information [Line Items]      
Net sales 160,615 150,878 136,771
Income from operations 37,246 36,241 35,389
Depreciation and amortization expense 2,538 2,561 2,090
Interest income 23 320 389
Interest expense 379    
Asia-Pacific Segment [Member]      
Segment Reporting Information [Line Items]      
Net sales 68,763 64,762 58,806
Income from operations 20,813 19,098 16,765
Depreciation and amortization expense 282 313 254
Interest income 103 121 111
Interest expense $ 6 $ 10 $ 12
[1] Unallocated corporate expenses are general corporate overhead expenses not directly attributable to any one of the business 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.