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Goodwill, Service Contracts and Other Assets - Service Contracts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 31, 2019 | May 31, 2018
Service contracts [Roll Forward] |  |
Balance at the beginning of the period | $ 545,768 | $ 586,988
Service contracts acquired | 8,064 | 9,393
Service contracts amortization | (56,190) | (54,044)
Foreign currency translation | (3,047) | 3,431
Balance at the end of the period | 494,595 | 545,768
Uniform rental and facility services |  |
Service contracts [Roll Forward] |  |
Balance at the beginning of the period | 492,067 | 529,923
Service contracts acquired | 2,864 | 4,098
Service contracts amortization | (46,943) | (45,296)
Foreign currency translation | (2,972) | 3,342
Balance at the end of the period | 445,016 | 492,067
First Aid and Safety Services |  |
Service contracts [Roll Forward] |  |
Balance at the beginning of the period | 27,294 | 30,062
Service contracts acquired | 14 | 985
Service contracts amortization | (3,853) | (3,842)
Foreign currency translation | (75) | 89
Balance at the end of the period | 23,380 | 27,294
All Other |  |
Service contracts [Roll Forward] |  |
Balance at the beginning of the period | 26,407 | 27,003
Service contracts acquired | 5,186 | 4,310
Service contracts amortization | (5,394) | (4,906)
Foreign currency translation | 0 | 0
Balance at the end of the period | $ 26,199 | $ 26,407

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