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Business Segments and Foreign Operations (Summarized Information Of Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
May 31, 2013 | May 31, 2012 | May 31, 2013 | May 31, 2012 | Aug. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | $ 93,103 |  | $ 87,022 |  | $ 275,079 |  | $ 257,933 |  |
Income from operations | 14,958 | [1] | 13,140 | [1] | 45,258 | [2] | 38,149 | [2] |
Depreciation and amortization expense | 1,327 |  | 1,216 |  | 3,765 |  | 3,691 |  |
Interest income | 105 |  | 61 |  | 362 |  | 182 |  |
Interest expense | 182 |  | 159 |  | 483 |  | 484 |  |
Total assets | 320,491 |  | 296,694 |  | 320,491 |  | 296,694 |  | 300,870
Operating Expenses | 32,826 |  | 29,942 |  | 94,379 |  | 88,414 |  |
Americas [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | 47,677 |  | 43,972 |  | 133,249 |  | 130,622 |  |
Income from operations | 5,967 | [1] | 3,637 | [1] | 14,363 | [2] | 12,571 | [2] |
Depreciation and amortization expense | 1,033 |  | 887 |  | 2,905 |  | 2,567 |  |
Interest income |  |  |  |  | 1 |  | 1 |  |
Interest expense | 179 |  | 157 |  | 476 |  | 478 |  |
Total assets | 193,129 |  | 184,105 |  | 193,129 |  | 184,105 |  |
Europe [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | 32,462 |  | 30,100 |  | 100,107 |  | 88,227 |  |
Income from operations | 6,715 | [1] | 7,221 | [1] | 22,666 | [2] | 17,963 | [2] |
Depreciation and amortization expense | 240 |  | 281 |  | 717 |  | 989 |  |
Interest income | 74 |  | 33 |  | 252 |  | 90 |  |
Total assets | 109,278 |  | 96,195 |  | 109,278 |  | 96,195 |  |
Asia-Pacific [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | 12,964 |  | 12,950 |  | 41,723 |  | 39,084 |  |
Income from operations | 2,276 | [1] | 2,282 | [1] | 8,229 | [2] | 7,615 | [2] |
Depreciation and amortization expense | 54 |  | 48 |  | 143 |  | 135 |  |
Interest income | 31 |  | 28 |  | 109 |  | 91 |  |
Interest expense | 3 |  | 2 |  | 7 |  | 6 |  |
Total assets | 18,084 |  | 16,394 |  | 18,084 |  | 16,394 |  |
Corporate [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Expenses | $ 4,900 |  | $ 5,000 |  | $ 14,700 |  | $ 14,600 |  |
[1] | As of and for the Three Months Ended May 31:AmericasEuropeAsia-PacificTotal2013Net sales$ 47,677$ 32,462$ 12,964$ 93,103Income from operations (1)$ 5,967$ 6,715$ 2,276$ 14,958Depreciation and amortization expense$ 1,033$ 240$ 54$ 1,327Interest income$ -$ 74$ 31$ 105Interest expense$ 179$ -$ 3$ 182Total assets$ 193,129$ 109,278$ 18,084$ 320,4912012Net sales$ 43,972$ 30,100$ 12,950$ 87,022Income from operations (1)$ 3,637$ 7,221$ 2,282$ 13,140Depreciation and amortization expense$ 887$ 281$ 48$ 1,216Interest income$ -$ 33$ 28$ 61Interest expense$ 157$ -$ 2$ 159Total assets$ 184,105$ 96,195$ 16,394$ 296,694Income from operations for the Americas segment included corporate expenses of $4.9 million and $5.0 million for the three months ended May 31, 2013 and 2012, respectively.
[2] | As of and for the Nine Months Ended May 31:AmericasEuropeAsia-PacificTotal2013Net sales$ 133,249$ 100,107$ 41,723$ 275,079Income from operations (2)$ 14,363$ 22,666$ 8,229$ 45,258Depreciation and amortization expense$ 2,905$ 717$ 143$ 3,765Interest income$ 1$ 252$ 109$ 362Interest expense$ 476$ -$ 7$ 483Total assets$ 193,129$ 109,278$ 18,084$ 320,4912012Net sales$ 130,622$ 88,227$ 39,084$ 257,933Income from operations (2)$ 12,571$ 17,963$ 7,615$ 38,149Depreciation and amortization expense$ 2,567$ 989$ 135$ 3,691Interest income$ 1$ 90$ 91$ 182Interest expense$ 478$ -$ 6$ 484Total assets$ 184,105$ 96,195$ 16,394$ 296,694Income from operations for the Americas segment included corporate expenses of $14.7 million and $14.6 million for the nine months ended May 31, 2013 and 2012, respectively.

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