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v3.20.2

Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands | May 31, 2020 | May 31, 2019 | May 31, 2018
--- | --- | --- | ---
Deferred tax assets: |  |  |
Allowance for doubtful accounts | $ 14,718 | $ 9,495 |
Inventory obsolescence | 13,744 | 9,257 |
Insurance reserves | 45,197 | 45,339 |
Stock-based compensation | 78,802 | 77,697 |
Net operating loss and foreign related carry-forwards | 7,657 | 9,109 |
Treasury locks | 39,046 | 5,806 |
Operating lease liabilities | 42,191 | 0 |
Deferred compensation and other | 73,562 | 48,922 |
Deferred tax assets, gross | 314,917 | 205,625 |
Valuation allowance | (6,411) | (7,308) | $ (11,302)
Deferred tax assets, net | 308,506 | 198,317 |
Deferred tax liabilities: |  |  |
Uniform and other rental items in service | 189,787 | 194,939 |
Property and equipment | 177,664 | 159,186 |
Service contracts and other intangible assets | 207,610 | 210,531 |
Capitalized contract costs | 77,741 | 70,228 |
Operating lease right-of-use assets | 42,191 | 0 |
State taxes and other | 2,092 | 1,612 |
Deferred tax liabilities | 697,085 | 636,496 |
Net deferred tax liability | $ 388,579 | $ 438,179 |

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