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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, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2016
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 2,089,037 | $ 2,054,603 | $ 2,153,745 | $ 2,093,739 | $ 1,846,460 | $ 1,769,993 | $ 1,920,055 | $ 1,970,079 | $ 8,391,124 | $ 7,506,587 | $ 7,122,086
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 405,115 | 419,924 | 467,657 | 476,697 | 398,219 | 389,629 | 443,518 | 449,795 | 1,769,393 | 1,681,161 |
Net income | $ 19,262 | $ 192,965 | $ 48,918 | $ 56,758 | $ 30,078 | $ 22,835 | $ 57,180 | $ 67,392 | $ 317,903 | $ 177,485 | $ 225,982
Net income per common share |  |  |  |  |  |  |  |  |  |  |
Basic (in Dollars per share) | $ 0.52 | $ 5.13 | $ 1.29 | $ 1.48 | $ 0.77 | $ 0.58 | $ 1.46 | $ 1.72 | $ 8.41 | $ 4.54 | $ 5.79
Diluted (in Dollars per share) | $ 0.51 | $ 5.08 | $ 1.28 | $ 1.46 | $ 0.76 | $ 0.58 | $ 1.44 | $ 1.70 | $ 8.34 | $ 4.48 | $ 5.73
Fuel |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 1,321,417 | $ 1,297,340 | $ 1,306,246 | $ 1,220,985 | $ 1,099,743 | $ 1,053,990 | $ 1,113,351 | $ 1,147,044 | $ 5,145,988 | $ 4,414,128 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 86,640 | 100,272 | 110,686 | 109,212 | 85,592 | 89,265 | 99,060 | 104,429 | 406,811 | 378,347 |
Grocery & other merchandise |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 511,834 | 502,750 | 572,151 | 597,413 | 500,068 | 476,309 | 544,799 | 566,174 | 2,184,147 | 2,087,349 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 159,929 | 160,150 | 183,133 | 190,364 | 155,374 | 148,099 | 174,590 | 179,127 | 693,576 | 657,190 |
Prepared food & fountain |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 241,163 | 240,618 | 261,998 | 261,840 | 233,150 | 228,278 | 248,345 | 243,655 | 1,005,621 | 953,430 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | 143,949 | 145,632 | 160,510 | 163,645 | 143,774 | 140,869 | 156,329 | 153,052 | 613,736 | 594,024 |
Other |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  |  |
Total revenue | 14,623 | 13,895 | 13,350 | 13,501 | 13,499 | 11,416 | 13,560 | 13,206 | 55,368 | 51,680 |
Gross profit |  |  |  |  |  |  |  |  |  |  |
Gross profit | $ 14,597 | $ 13,870 | $ 13,328 | $ 13,476 | $ 13,479 | $ 11,396 | $ 13,539 | $ 13,187 | $ 55,270 | $ 51,600 |

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