Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2017	May 31, 2018	May 31, 2017	May 31, 2016	May 23, 2018
Income Taxes [Line Items]
Federal statutory income tax rate	21.00%	35.00%	29.20%	35.00%	35.00%
Income tax expense			$ 6,900
Tax amount related to purchase of noncontrolling interest and its carrying value				$ 539
Tax benefits (expense) related to defined benefit pension liability credited to other comprehensive income			(309)	(1,158)	$ 1,175
Tax benefits (expenses) related to cash flow hedges credited to (deducted from) other comprehensive income			$ (392)	$ 1,700	$ (13,316)
Effective tax rates upon inclusion of net earnings attributable to noncontrolling interests			3.90%	26.70%	27.20%
Ownership interest percentage						25.00%
Minimum likelihood of tax benefits being recognized upon ultimate settlement	50.00%		50.00%
Total unrecognized tax benefits	$ 2,638		$ 2,638	$ 2,975	$ 2,827
Unrecognized tax benefits if recognized would affect tax rate attributable to controlling interest	2,235		2,235
Interest and penalties related to unrecognized tax benefits	271		271	307	$ 538
Valuation allowance for deferred tax assets	14,006		14,006	$ 12,987
Settlement with Taxing Authority
Income Taxes [Line Items]
Liability for unrecognized tax benefit expected to be settled in the next 12 months	753		753
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carry forwards	9,363		9,363
Valuation allowance for deferred tax assets	9,537		$ 9,537
State and Local Jurisdiction | Earliest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration date			May 31, 2019
State and Local Jurisdiction | Latest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration date			May 31, 2038
Non - United States
Income Taxes [Line Items]
Net operating loss carry forwards	4,837		$ 4,837
Tax credit carry forwards	162		$ 162
Tax credit carryforward, expiration date			May 31, 2028
Investment tax credit carry forwards	649		$ 649
Investmrnt tax credit carryforwards, expiration date			May 31, 2025
Valuation allowance for deferred tax assets	$ 4,469		$ 4,469
Non - United States | Earliest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration date			May 31, 2019
Non - United States | Latest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration date			May 31, 2023