Investments in Unconsolidated Affiliates - Schedule of Combined Financial Information for Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Nov. 30, 2023	Aug. 31, 2023	Nov. 30, 2022	Aug. 31, 2022	Nov. 30, 2023	Nov. 30, 2022	May 31, 2023
Investments in and Advances to Affiliates [Line Items]
Cash and cash equivalents	$ 430,906				$ 430,906		$ 454,946
Total assets	3,584,137				3,584,137		3,650,918
Current liabilities	945,342				945,342		717,558
Short-term borrowings	175,000				175,000		2,813
Current maturities of long-term debt	150,269				150,269		264
Long-term debt	298,549				298,549		689,718
Other noncurrent liabilities	112,878				112,878		113,286
Equity	1,792,809				1,792,809		1,696,011
Total liabilities and equity	3,584,137				3,584,137		3,650,918
Net sales	1,086,918		$ 1,175,541		2,280,174	$ 2,584,206
Gross margin	123,714		105,763		321,203	275,137
Operating income	(5,932)		(7,014)		71,773	59,700
Depreciation and amortization	28,007		28,354		56,332	56,355
Income tax expense	7,198		4,131		35,975	23,629
Net earnings	28,167	$ 99,703	19,505	$ 65,244	127,870	84,749
Equity Method Investment, Nonconsolidated Investee, Other
Investments in and Advances to Affiliates [Line Items]
Cash and cash equivalents	37,728				37,728		49,185
Other current assets	871,945				871,945		899,913
Noncurrent assets	372,258				372,258		394,468
Total assets	1,281,931				1,281,931		1,343,566
Current liabilities	282,320				282,320		247,796
Current maturities of long-term debt							36,936
Long-term debt	349,323				349,323		349,215
Other noncurrent liabilities	138,566				138,566		144,649
Equity	511,722				511,722		564,970
Total liabilities and equity	1,281,931				1,281,931		$ 1,343,566
Net sales	676,875		711,665		1,397,308	1,535,607
Gross margin	166,939		147,299		361,247	328,704
Operating income	134,120		107,356		283,529	245,183
Depreciation and amortization	8,303		6,864		16,946	15,052
Interest expense	4,538		3,910		10,277	6,590
Income tax expense	6,708		1,262		8,354	3,372
Net earnings	$ 122,670		$ 105,183		$ 266,236	$ 238,421