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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details) $ in Thousands | 12 Months Ended
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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.

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