Annual report pursuant to Section 13 and 15(d)

Net Periodic Benefit Costs (Detail)

v3.21.2
Net Periodic Benefit Costs (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00%    
Other Postretirement Benefit Plan, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ (200) $ (300) $ (100)
Foreign Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 198 171 257
Expected return on assets (347) (357) (345)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 4 (18) (65)
Amortization of actuarial loss 139 205 263
Defined Benefit Plan Cost of Special Events 0 (728) (56)
Foreign Defined Benefit Plan, Net Periodic Benefit Cost 110 (443) 504
Defined Benefit Plan, Service Cost 116 284 450
Domestic Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 1,156 1,331 1,694
Expected return on assets (1,610) (1,770) (2,208)
Amortization of actuarial loss 1,322 1,212 990
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ 868 $ 773 $ 476