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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, 2018 USD ($) | May 31, 2017 USD ($) | May 31, 2018 USD ($) item | May 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | item |  |  |  | 3 |
Net sales |  | $ 107,025 | $ 98,178 | $ 305,878 | $ 283,945
Income from operations |  | 22,329 | 20,613 | 58,833 | 55,991
Depreciation and amortization expense |  | 1,963 | 1,707 | 5,849 | 5,005
Interest income |  | 107 | 112 | 371 | 392
Interest expense |  | 1,205 | 693 | 3,048 | 1,822
Unallocated Corporate [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Income from operations | [1] | (6,243) | (5,957) | (19,274) | (19,114)
Depreciation and amortization expense | [1] | 198 | 10 | 586 | 28
Americas Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 52,999 | 49,046 | 144,129 | 136,964
Income from operations |  | 15,709 | 14,402 | 37,075 | 35,861
Depreciation and amortization expense |  | 999 | 1,100 | 3,139 | 3,239
Interest income |  |  | 2 | 1 | 6
Interest expense |  | 1,202 | 691 | 3,040 | 1,813
EMEA Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 39,571 | 34,386 | 114,231 | 100,848
Income from operations |  | 9,565 | 8,009 | 27,933 | 25,514
Depreciation and amortization expense |  | 685 | 534 | 1,890 | 1,552
Interest income |  | 34 | 97 | 271 | 286
Asia-Pacific Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 14,455 | 14,746 | 47,518 | 46,133
Income from operations |  | 3,298 | 4,159 | 13,099 | 13,730
Depreciation and amortization expense |  | 81 | 63 | 234 | 186
Interest income |  | 73 | 13 | 99 | 100
Interest expense |  | $ 3 | $ 2 | $ 8 | $ 9
[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.

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