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Equity Compensation Plans (Tables) | 12 Months Ended
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May 31, 2021
Stock Option Activity |
(options in thousands) |  | Options |  |  | Weighted-Average Exercise Price |  |  | Weighted-Average Grant Date Fair Value |
Outstanding at May 31, 2018 (1,016 exercisable) |  |  | 4,998 |  |  | $ | 21.32 |  |  | $ | 5.72 |
Granted |  |  | 1,054 |  |  |  | 31.46 |  |  |  | 7.46 |
Exercised |  |  | (1,026 | ) |  |  | 15.64 |  |  |  | 4.46 |
Forfeited |  |  | (256 | ) |  |  | 23.54 |  |  |  | 6.21 |
Outstanding at May 31, 2019 (1,234 exercisable) |  |  | 4,770 |  |  |  | 24.69 |  |  |  | 6.35 |
Granted |  |  | 1,124 |  |  |  | 31.96 |  |  |  | 7.78 |
Exercised |  |  | (1,438 | ) |  |  | 20.12 |  |  |  | 5.53 |
Forfeited |  |  | (132 | ) |  |  | 28.72 |  |  |  | 7.10 |
Outstanding at May 31, 2020 (972 exercisable) |  |  | 4,324 |  |  |  | 27.98 |  |  |  | 6.98 |
Granted |  |  | 403 |  |  |  | 34.23 |  |  |  | 7.71 |
Exercised |  |  | (1,389 | ) |  |  | 24.38 |  |  |  | 6.31 |
Forfeited |  |  | (381 | ) |  |  | 28.99 |  |  |  | 7.20 |
Outstanding at May 31, 2021 (643 exercisable) |  |  | 2,957 |  |  |  | 30.38 |  |  |  | 7.36 |
Summary of Stock Options Outstanding | The following is a summary of stock options outstanding at May 31, 2021:
|  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  | Average |  |  |  |  |  |  |  |  |  |
(options in thousands) |  |  |  |  | Contractual Life |  |  | Weighted-Average |  |  |  |  |  | Weighted-Average |
Range of Exercise Price |  | Number |  |  | (in years) |  |  | Exercise Price |  |  | Number |  |  | Exercise Price |
$10.75 - $20.00 |  |  | 54 |  |  |  | 3.1 |  |  | $ | 15.65 |  |  |  | 51 |  |  | $ | 15.45 |
$20.01 - $30.00 |  |  | 376 |  |  |  | 1.8 |  |  |  | 22.55 |  |  |  | 150 |  |  |  | 23.07 |
$30.01 - $31.50 |  |  | 1,150 |  |  |  | 2.1 |  |  |  | 30.87 |  |  |  | 299 |  |  |  | 30.76 |
$31.51 - $32.00 |  |  | 898 |  |  |  | 3.4 |  |  |  | 31.95 |  |  |  | 101 |  |  |  | 31.95 |
$32.01 - $35.28 |  |  | 479 |  |  |  | 4.1 |  |  |  | 34.07 |  |  |  | 42 |  |  |  | 33.53 |
|  |  | 2,957 |  |  |  | 2.8 |  |  |  | 30.38 |  |  |  | 643 |  |  |  | 28.10 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options Intrinsic Value |
|  | Year Ended |
(in thousands) |  | May 31, 2021 |  |  | May 31, 2020 |  |  | May 31, 2019 |
Aggregate intrinsic value of options outstanding |  | $ | 46,667 |  |  | $ | 32,988 |  |  | $ | 22,798 |
Aggregate intrinsic value of options exercisable |  | $ | 11,617 |  |  | $ | 10,814 |  |  | $ | 10,222 |
Aggregate intrinsic value of options exerised |  | $ | 22,349 |  |  | $ | 19,597 |  |  | $ | 21,382 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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