Annual report pursuant to Section 13 and 15(d)

Net Periodic Benefit Costs (Detail)

v3.20.2
Net Periodic Benefit Costs (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Other Postretirement Benefit Plan, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ (300) $ (100) $ 100
Foreign Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 171 257 278
Expected return on assets (357) (345) (366)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (18) (65) (69)
Amortization of actuarial loss 205 263 306
Defined Benefit Plan Cost of Special Events (728) (56) 18
Foreign Defined Benefit Plan, Net Periodic Benefit Cost (443) 504 607
Defined Benefit Plan, Service Cost 284 450 440
Domestic Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 1,331 1,694 1,633
Expected return on assets (1,770) (2,208) (2,668)
Amortization of actuarial loss 1,212 990 1,127
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ 773 $ 476 $ 92