Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plans - Components of Postretirement Benefit Cost and Pension Cost (Detail)

v3.22.2.2
Employee Benefit Plans - Components of Postretirement Benefit Cost and Pension Cost (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Pension Plans, Defined Benefit [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 83 $ 94 $ 166 $ 187
Interest cost 308 298 616 598
Expected return on assets (542) (682) (1,085) (1,364)
Amortization of actuarial loss 165 229 330 442
Net pension cost (benefit) 14 (61) 27 (137)
Other Postretirement Benefit Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 3 4 7 7
Amortization of actuarial loss 3 6 6 12
Net pension cost (benefit) $ 6 $ 10 $ 13 $ 19