Segment Operations - Reconciliation from Earnings Before Income Taxes to Adjusted EBITDA from Continuing Operations (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Segment Reporting [Abstract]
Earnings before income taxes		$ 37,109	$ 24,543	$ 67,899	$ 60,333
Plus: Net loss attributable to noncontrolling interest		251		496
Net earnings before income taxes attributable to controlling interest		37,360	24,543	68,395	60,333
Interest expense, net		1,033	472	1,522	1,546
EBIT	[1]	38,393	25,015	69,917	61,879
Corporate costs eliminated at Separation			9,671		19,343
Restructuring and other expense, net		2,620	6	3,778	6
Separation costs			7,056		9,466
Loss on extinguishment of debt					1,534
Gain on sale of assets in equity income			(2,780)		(2,780)
Adjusted EBIT	[1]	41,013	38,968	73,695	89,448
Depreciation and amortization		11,927	12,215	23,757	24,290
Stock-based compensation	[2]	3,273	3,861	7,197	7,220
Adjusted EBITDA from continuing operations		$ 56,213	$ 55,044	$ 104,649	$ 120,958

[1] EBIT and adjusted EBIT are not used by management to evaluate our performance, engage in financial and operational planning, or to determine incentive compensation. Instead, they are included as subtotals in the reconciliation of earnings before income taxes to adjusted EBITDA from continuing operations, which management uses to assess operating performance.

[2] Excludes $2,665 of stock-based compensation reported in restructuring and other expense, net in our consolidated statement of earnings for the three months ended November 30, 2024 related to the accelerated vesting of certain outstanding equity awards upon retirement of our former CEO effective, November 1, 2024.