Revenue Recognition - Schedule of Adjustments on Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	Feb. 28, 2019	Feb. 28, 2018	Jun. 01, 2018	May 31, 2018
Assets
Receivables	$ 512,739						$ 512,739			$ 572,689
Total inventories	486,074						486,074			454,027
Prepaid expenses and other current assets	68,082						68,082			60,134
Liabilities and equity
Income taxes payable	106						106			4,593
Deferred income taxes, net	80,034						80,034			60,188
Shareholders' equity - controlling interest	856,622						856,622			918,769
Noncontrolling interests	120,386						120,386			$ 117,606
Consolidated Statements of Earnings
Net sales	874,381			$ 841,657			2,820,714	$ 2,561,160
Cost of goods sold	784,360			714,603			2,466,762	2,161,249
Income tax expense	8,415			(24,039)			34,032	7,124
Net earnings	29,548	$ 37,792	$ 56,958	78,297	$ 41,622	$ 48,074	124,298	167,993
Net earnings attributable to noncontrolling interests	2,775			(791)			8,581	3,968
Net earnings attributable to controlling interest	26,773			$ 79,088			115,717	$ 164,025
Accounting Standards Update 2014-09
Assets
Receivables									$ 577,395
Total inventories									450,575
Prepaid expenses and other current assets									61,078
Liabilities and equity
Deferred income taxes, net									60,642
Noncontrolling interests									118,176
Accounting Standards Update 2014-09 | Topic 606 Adjustments
Assets
Receivables	(4,785)						(4,785)		4,706
Total inventories	6,207						6,207		(3,452)
Prepaid expenses and other current assets	(4,057)						(4,057)		944
Liabilities and equity
Income taxes payable	(41)						(41)
Deferred income taxes, net	(454)						(454)		454
Shareholders' equity - controlling interest	(1,489)						(1,489)
Noncontrolling interests	(651)						(651)		$ 570
Consolidated Statements of Earnings
Net sales	464						(3,193)
Cost of goods sold	170						(2,755)
Income tax expense	65						(41)
Net earnings	229						(397)
Net earnings attributable to noncontrolling interests	(34)						(82)
Net earnings attributable to controlling interest	263						(315)
Accounting Standards Update 2014-09 | Balances Without Adoption of Topic 606
Assets
Receivables	507,954						507,954
Total inventories	492,281						492,281
Prepaid expenses and other current assets	64,025						64,025
Liabilities and equity
Income taxes payable	65						65
Deferred income taxes, net	79,580						79,580
Shareholders' equity - controlling interest	855,133						855,133
Noncontrolling interests	119,735						119,735
Consolidated Statements of Earnings
Net sales	874,845						2,817,521
Cost of goods sold	784,530						2,464,007
Income tax expense	8,480						33,991
Net earnings	29,777						123,901
Net earnings attributable to noncontrolling interests	2,741						8,499
Net earnings attributable to controlling interest	$ 27,036						$ 115,402