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Pension and Profit Sharing Plans - Additional information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended
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Mar. 31, 2018 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) Employee CompensationPlan | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, payments for settlement | $ 3,900 |  |  |  |
Settlement cost | $ 600 |  |  |  | $ 649
Employees fully vesting in employer's own contributions made beginning in 2007, requirement years |  |  | 4 years |  |
Costs relating to employer discretionary contributions |  |  | $ 8,200 | $ 8,000 | 8,400
Current actuarial estimates contributions |  |  | $ 700 | 600 | 600
Number of employees covered under multi-employer pension plans | Employee |  |  | 50 |  |
Number of multi-employer plans | CompensationPlan |  |  | 3 |  |
Collective bargaining agreement for employer covered under multi-employer plans, Expiration date, First |  |  | Feb. 29, 2024 |  |
Collective bargaining agreement for employer covered under multi-employer plans, Expiration date, Last |  |  | Mar. 31, 2025 |  |
Expenses related to multi employer plans |  |  | $ 1,700 | $ 1,500 | $ 1,600
Scenario Forecast [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Expenses related to multi employer plans |  | $ 1,800 |  |  |
Minimum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Current actuarial estimates contributions for fiscal year 2020 |  |  | 500 |  |
Maximum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Current actuarial estimates contributions for fiscal year 2020 |  |  | $ 1,000 |  |

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- Definition Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 + Details
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- Definition Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan that will expire first in a group of associated collective bargaining arrangements, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan that will expire last in a group of associated collective bargaining arrangements, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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