Investments in Unconsolidated Affiliates - Schedule of Combined Financial Information for Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Nov. 30, 2024	Aug. 31, 2024	Nov. 30, 2023	Aug. 31, 2023	Nov. 30, 2024	Nov. 30, 2023	May 31, 2024
Investments in and Advances to Affiliates [Line Items]
Cash and cash equivalents	$ 193,805				$ 193,805		$ 244,225
Total assets	1,657,017				1,657,017		1,638,637
Current liabilities	169,464				169,464		178,376
Long-term debt	295,721				295,721		298,133
Other non-current liabilities	60,305				60,305		62,243
Equity	911,321				911,321		888,879
Total liabilities and equity	1,657,017				1,657,017		1,638,637
Net sales	274,046		$ 298,229		531,354	$ 610,147
Gross profit	74,059		63,278		136,554	132,908
Net earnings	28,009	$ 24,008	28,167	$ 99,703	52,017	127,870
Equity Method Investment, Nonconsolidated Investee, Other
Investments in and Advances to Affiliates [Line Items]
Cash and cash equivalents	51,240				51,240		36,163
Other current assets	547,436				547,436		605,043
Noncurrent assets	372,466				372,466		360,261
Total assets	971,142				971,142		1,001,467
Current liabilities	212,806				212,806		264,963
Current maturities of long-term debt	3,208				3,208		13,450
Long-term debt	356,539				356,539		349,431
Other non-current liabilities	143,774				143,774		146,984
Equity	254,815				254,815		226,639
Total liabilities and equity	971,142				971,142		$ 1,001,467
Net sales	492,990		513,470		1,008,663	1,082,053
Gross profit	136,693		148,298		271,028	321,315
Operating income	90,847		118,958		185,193	250,405
Depreciation and amortization	7,725		7,224		15,731	14,800
Interest expense	4,529		4,538		9,287	10,277
Income tax expense	309		442		954	1,351
Net earnings	$ 89,186		$ 115,114		$ 179,868	$ 240,766