Pension Plan - Additional Information (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Feb. 28, 2022 |
Nov. 30, 2021 |
Nov. 30, 2020 |
Nov. 30, 2021 |
Nov. 30, 2020 |
Feb. 28, 2021 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Employees covered under noncontributory Pension Plan | 13.00% | |||||
| Compensation period preceding retirement and termination | 5 years | |||||
| Period used for calculating Pension Plan liability | 25 years | |||||
| Unfunded pension liability | $ 5,299,000 | $ 5,299,000 | $ 6,299,000 | |||
| Net periodic benefit cost | 1,147,000 | $ 577,000 | 1,944,000 | $ 1,732,000 | ||
| Pension settlement charge | 750,000 | 750,000 | ||||
| Probable pension settlement charge | 1,200,000 | |||||
| Minimum [Member] | ||||||
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Expected contributions | 1,000,000.0 | 1,000,000.0 | ||||
| Maximum [Member] | ||||||
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Expected contributions | $ 3,000,000.0 | $ 3,000,000.0 | ||||
| Scenario Forecast [Member] | ||||||
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Minimum required contribution to the plan | $ 0 | |||||