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Consolidated Statements Of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Apr. 30, 2012 | Apr. 30, 2011 | Apr. 30, 2010
Consolidated Statements Of Earnings [Abstract] |  |  |  |  |
Total revenue | $ 6,987,804 |  | $ 5,635,240 |  | $ 4,637,087
Cost of goods sold (exclusive of depreciation and amortization, shown separately below) | 5,984,114 |  | 4,754,173 |  | 3,844,735
Gross profit | 1,003,690 | [1] | 881,067 | [1] | 792,352
Operating expenses | 688,431 |  | 607,628 |  | 526,291
Depreciation and amortization | 96,552 |  | 82,355 |  | 73,546
Interest, net | 35,192 |  | 28,497 |  | 10,933
Loss on early retirement of debt |  |  | 11,350 |  |
Earnings before income taxes | 183,515 |  | 151,237 |  | 181,582
Federal and state income taxes | 66,724 |  | 56,614 |  | 64,620
Net earnings | $ 116,791 |  | $ 94,623 |  | $ 116,962
Earnings per common share |  |  |  |  |
Basic | $ 3.07 |  | $ 2.24 |  | $ 2.30
Diluted | $ 3.04 |  | $ 2.22 |  | $ 2.29
[1] | Gross profit is given before charge for depreciation and amortization and credit card fees.

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