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Income Taxes - Reconciliation Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2018 | May 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward] |  |
Balance at beginning of period | $ 17,357 | $ 16,531
Additions from G&K acquisition | 6,394 | 2,084
Additions for tax positions of prior years | 5,675 | 2,520
Settlements |  | (1,044)
Statute expirations | (2,943) | (2,734)
Additions for tax positions of the current year | 10,164 |
Balance at end of period | $ 36,647 | $ 17,357

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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