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Segment Disclosure - Net Income by Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 27, 2012 | Oct. 29, 2011 | Oct. 27, 2012 segment | Oct. 29, 2011
Segment Reporting Information |  |  |  |
Number of business units |  |  | 5 |
Net sales | $ 149,871 | $ 135,910 | $ 282,790 | $ 254,607
Contribution margin | 29,556 | 18,544 | 52,866 | 35,841
Non-allocated operating expenses: |  |  |  |
General and administrative | 6,850 | 6,972 | 13,431 | 13,436
Product design and development | 5,845 | 5,636 | 11,866 | 11,353
Operating income | 16,861 | 5,936 | 27,569 | 11,052
Nonoperating income (expense): |  |  |  |
Interest income | 348 | 457 | 779 | 892
Interest expense | (36) | (95) | (123) | (171)
Other income (expense), net | 150 | (47) | (30) | (193)
Income before income taxes | 17,323 | 6,251 | 28,195 | 11,580
Income tax expense | 5,776 | 2,292 | 9,970 | 4,253
Net income | 11,547 | 3,959 | 18,225 | 7,327
Depreciation and amortization | 3,955 | 4,359 | 7,831 | 9,010
Commerical |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 39,773 | 43,704 | 78,130 | 76,407
Contribution margin | 8,566 | 7,449 | 14,768 | 11,987
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | 1,213 | 1,517 | 2,493 | 3,198
Live Events |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 50,604 | 46,664 | 95,113 | 85,181
Contribution margin | 8,073 | 6,021 | 15,149 | 9,429
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | 1,161 | 1,257 | 2,265 | 2,568
Schools & Theatres |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 21,688 | 17,239 | 39,861 | 35,721
Contribution margin | 3,434 | 1,409 | 6,011 | 4,809
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | 562 | 581 | 1,138 | 1,220
Transportation |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 17,571 | 12,439 | 34,167 | 23,939
Contribution margin | 6,025 | 2,795 | 12,004 | 6,139
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | 345 | 339 | 669 | 700
International |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 20,235 | 15,864 | 35,519 | 33,359
Contribution margin | 3,458 | 870 | 4,934 | 3,477
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | 222 | 166 | 359 | 330
Unallocated |  |  |  |
Nonoperating income (expense): |  |  |  |
Depreciation and amortization | $ 452 | $ 499 | $ 907 | $ 994

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