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Segment Information - Information Related to Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2016 | Nov. 30, 2015 | Nov. 30, 2016 | Nov. 30, 2015 | May 31, 2016
Segment Reporting Information |  |  |  |  |
Revenue | $ 1,296,923 | $ 1,219,080 | $ 2,591,053 | $ 2,417,970 |
Income (loss) before income taxes | 189,622 | 184,289 | 382,476 | 353,503 |
Total assets | 4,214,579 | 4,444,610 | 4,214,579 | 4,444,610 | $ 4,098,815
Operating Segments | Uniform Rental and Facility Services |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenue | 1,005,565 | 937,704 | 2,005,161 | 1,876,112 |
Income (loss) before income taxes | 177,361 | 169,295 | 362,606 | 334,676 |
Total assets | 3,266,422 | 2,990,828 | 3,266,422 | 2,990,828 |
Operating Segments | First Aid and Safety Services |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenue | 124,797 | 120,438 | 249,636 | 219,926 |
Income (loss) before income taxes | 14,779 | 14,847 | 26,290 | 23,439 |
Total assets | 443,151 | 426,089 | 443,151 | 426,089 |
Operating Segments | All Other |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenue | 166,561 | 160,938 | 336,256 | 321,932 |
Income (loss) before income taxes | 10,718 | 16,207 | 20,923 | 27,741 |
Total assets | 361,433 | 355,082 | 361,433 | 355,082 |
Corporate |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenue | 0 | 0 | 0 | 0 |
Income (loss) before income taxes | (13,236) | (16,060) | (27,343) | (32,353) |
Total assets | $ 143,573 | $ 672,611 | $ 143,573 | $ 672,611 |

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