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Quarterly Financial Data - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 1,846,460 | $ 1,769,993 | $ 1,920,055 | $ 1,970,079 | $ 1,582,954 | $ 1,565,940 | $ 1,924,600 | $ 2,048,592 | $ 7,506,587 | $ 7,122,086 | $ 7,767,216
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 398,219 | 389,629 | 443,518 | 449,795 | 388,220 | 371,169 | 442,990 | 411,242 | 1,681,161 | 1,613,621 | 1,439,785
Net income | $ 30,078 | $ 22,835 | $ 57,180 | $ 67,392 | $ 47,044 | $ 38,099 | $ 79,033 | $ 61,806 | $ 177,485 | $ 225,982 | $ 180,628
Net income per common share |  |  |  |  |  |  |  |  |  |  |
Basic (in Dollars per share) | $ 0.77 | $ 0.58 | $ 1.46 | $ 1.72 | $ 1.20 | $ 0.98 | $ 2.03 | $ 1.59 | $ 4.54 | $ 5.79 | $ 4.66
Diluted (in Dollars per share) | $ 0.76 | $ 0.58 | $ 1.44 | $ 1.70 | $ 1.19 | $ 0.97 | $ 2.00 | $ 1.57 | $ 4.48 | $ 5.73 | $ 4.62
Fuel |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 1,099,743 | $ 1,053,990 | $ 1,113,351 | $ 1,147,044 | $ 873,081 | $ 888,744 | $ 1,166,736 | $ 1,286,241 | $ 4,414,128 | $ 4,214,802 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 85,592 | 89,265 | 99,060 | 104,429 | 85,828 | 85,460 | 122,690 | 87,681 | 378,347 | 381,659 |
Grocery & other merchandise |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 500,068 | 476,309 | 544,799 | 566,174 | 477,487 | 453,388 | 516,578 | 526,620 | 2,087,349 | 1,974,073 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 155,374 | 148,099 | 174,590 | 179,127 | 153,299 | 141,482 | 162,904 | 171,549 | 657,190 | 629,234 |
Prepared food & fountain |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 233,150 | 228,278 | 248,345 | 243,655 | 218,349 | 209,595 | 229,388 | 223,381 | 953,430 | 880,713 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 143,774 | 140,869 | 156,329 | 153,052 | 135,073 | 130,027 | 145,513 | 139,679 | 594,024 | 550,292 |
Other |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 13,499 | 11,416 | 13,560 | 13,206 | 14,037 | 14,213 | 11,898 | 12,350 | 51,680 | 52,498 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | $ 13,479 | $ 11,396 | $ 13,539 | $ 13,187 | $ 14,020 | $ 14,200 | $ 11,883 | $ 12,333 | $ 51,600 | $ 52,436 |

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