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v3.22.1

Pensions and Other Benefits (Details) - USD ($) | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | $ 271,985,000 | $ 286,678,000
(Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 65,673,000 | 72,668,000
(Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 133,670,000 | 122,071,000
(Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 1,160,000 | 1,169,000
Fair Value Measured at Net Asset Value Per Share [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 71,482,000 | 90,770,000
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 80,020,000 | 116,468,000
Equity securities | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 46,699,000 | 63,758,000
Equity securities | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Equity securities | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Equity securities | Fair Value Measured at Net Asset Value Per Share [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 33,321,000 | 52,710,000
Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 178,155,000 | 155,553,000
Fixed income securities | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 17,013,000 | 7,115,000
Fixed income securities | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 133,670,000 | 122,071,000
Fixed income securities | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 1,160,000 | 1,169,000
Fixed income securities | Fair Value Measured at Net Asset Value Per Share [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 26,312,000 | 25,198,000
Real Estate Funds [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 11,849,000 | 12,863,000
Real Estate Funds [Member] | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 1,000
Real Estate Funds [Member] | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Real Estate Funds [Member] | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 11,849,000 | 12,862,000
Cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 1,961,000 | 1,794,000
Cash equivalents | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 1,961,000 | 1,794,000
Cash equivalents | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Cash equivalents | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | 0 | 0
Cash equivalents | Fair Value Measured at Net Asset Value Per Share [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Asset categories: | $ 0 | $ 0

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