Segment Operations - Financial Information for Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	May 31, 2024
Segment Reporting Information [Line Items]
Net sales	$ 257,308	$ 311,918
Restructuring and other expense, net	1,158
Separation costs		2,410
Miscellaneous income, net	486	299
Loss on extinguishment of debt		1,534
Equity income	35,492	45,424
Adjusted EBITDA from continuing operations	30,790	35,791
Total assets of continuing operations	1,645,271		$ 1,638,637
Total assets of continuing operations	1,645,271		1,638,637
Unallocated Corporate and Other
Segment Reporting Information [Line Items]
Net sales		28,637
Restructuring and other expense, net	869
Separation costs		2,410
Miscellaneous income, net	227	211
Loss on extinguishment of debt		1,534
Equity income	(1,153)	381
Adjusted EBITDA from continuing operations	(9,067)	(8,052)
Total
Segment Reporting Information [Line Items]
Adjusted EBITDA from continuing operations	48,437	65,915
Total Reportable Segments
Segment Reporting Information [Line Items]
Net sales	257,308	283,281
Restructuring and other expense, net	289
Miscellaneous income, net	259	88
Equity income	36,645	45,043
Adjusted EBITDA from continuing operations	57,504	73,967
Total assets of continuing operations	1,342,493		1,230,549
Total Reportable Segments | Consumer products
Segment Reporting Information [Line Items]
Net sales	117,596	117,353
Miscellaneous income, net	17	25
Adjusted EBITDA from continuing operations	17,775	14,275
Total assets of continuing operations	564,744		557,826
Total Reportable Segments | Building Products
Segment Reporting Information [Line Items]
Net sales	139,712	165,928
Restructuring and other expense, net	289
Miscellaneous income, net	242	63
Equity income	36,645	45,043
Adjusted EBITDA from continuing operations	39,729	$ 59,692
Total assets of continuing operations	777,749		672,723
Unallocated Corporate and Other
Segment Reporting Information [Line Items]
Total assets of continuing operations	$ 302,778		$ 408,088