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Capital Stock and Stock-Based Awards (Tables)

12 Months Ended

May 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of capital stock

Capital stock consisted of the following as of May 31, 2023:

			Class A Stock						Common Stock						Preferred Stock
Authorized			4,000,000						70,000,000						2,000,000
Reserved for Issuance			—						7,005,664						—
Outstanding			1,656,200						30,004,691						—

Schedule of share-based compensation activity

The following table sets forth the intrinsic value of stock options exercised, pretax stock-based compensation cost and related tax benefits for the Company's equity plans for the fiscal years ended May 31:

			2023									2022									2021
Total intrinsic value of stock options exercised			$			8.2						$			5.1						$			0.1
Total stock-based compensation cost (pretax)						10.5									7.8									6.6
Tax benefits (shortfalls) related to stock-based compensation cost						(7.8)									2.3									(3.7)
Weighted average grant date fair value per option			$			11.62						$			8.04						$			3.80

Schedule of stock option activity

The following table sets forth the stock option activity under the Company's equity plans for the fiscal year ended May 31, 2023:

			Options									Weighted Average Exercise Price									Average Remaining Contractual Term (in years)									Aggregate Intrinsic Value (in millions)
Outstanding at May 31, 2022						4,257,925						$			30.54
Granted						314,996									41.90
Exercised						(689,711)									31.28
Expired, canceled and forfeited						(694,809)									39.06
Outstanding at May 31, 2023						3,188,401						$			29.63									4.6						$			41.3
Exercisable at May 31, 2023						1,717,085						$			31.16									4.2						$			19.7

Schedule of restricted stock unit activity

The following table sets forth the restricted stock unit award activity for the fiscal years ended May 31:

						2023									2022									2021
Granted						139,111									178,461									137,106
Weighted average grant date price per unit			$			41.99						$			34.45						$			21.24

The following table sets forth the MSPP RSUs activity for the fiscal years ended May 31:

						2023									2022									2021
MSPP RSUs allocated						37,865									33,761									5,665
Purchase price per unit			$			25.51						$			24.67						$			16.88

Schedule of nonvested restricted stock unit activity

The following table sets forth the restricted stock unit and MSPP RSUs activity for the year ended May 31, 2023:

			Restricted stock units and MSPP RSUs												Weighted Average grant date fair value
Nonvested as of May 31, 2022			317,593									$			30.17
Granted			176,976												37.00
Vested			(153,543)												31.59
Forfeited			(8,440)												33.18
Nonvested as of May 31, 2023			332,586									$			33.08

Schedule of employee stock purchase plan activity

The following table sets forth the ESPP share activity for the fiscal years ended May 31:

						2023									2022									2021
Shares issued						80,897									59,322									67,097
Weighted average purchase price per share			$			29.07						$			32.52						$			22.19

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