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v3.19.2

Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands | May 31, 2019 | May 31, 2018 | May 31, 2017
--- | --- | --- | ---
Deferred tax assets: |  |  |
Allowance for doubtful accounts | $ 9,495 | $ 8,209 |
Inventory obsolescence | 9,257 | 10,425 |
Insurance and contingencies | 45,339 | 43,482 |
Stock-based compensation | 77,697 | 64,376 |
Net operating loss and foreign related carry-forwards | 9,109 | 12,882 |
Treasury locks | 5,806 | 0 |
Deferred compensation and other | 48,922 | 37,319 |
Deferred tax assets, gross | 205,625 | 176,693 |
Valuation allowance | (7,308) | (11,302) | $ (18,088)
Deferred tax assets, net | 198,317 | 165,391 |
Deferred tax liabilities: |  |  |
Uniform and other rental items in service | 194,939 | 170,157 |
Property and equipment | 159,186 | 126,273 |
Service contracts and other intangible assets | 210,531 | 215,455 |
Treasury locks | 0 | 4,185 |
Capitalized contract costs | 70,228 | 0 |
State taxes and other | 1,612 | 1,902 |
Deferred tax liabilities | 636,496 | 517,972 |
Net deferred tax liability | $ 438,179 | $ 352,581 |

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