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Pension and Post-retirement Plans - Defined Benefit plan, Allocation of Investment Funds (Details) - Pension obligations - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | $ 87,466 | $ 119,325 | $ 123,950
Fair Value, Recurring |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 66,752 | 85,359 |
Fair Value, Recurring | Equity securities |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 0 | 6,802 |
Fair Value, Recurring | Fixed income |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 66,752 | 78,557 |
Fair Value, Recurring | Level 1 |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 457 | 536 |
Fair Value, Recurring | Level 1 | Equity securities |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 0 | 0 |
Fair Value, Recurring | Level 1 | Fixed income |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 457 | 536 |
Fair Value, Recurring | Level 2 |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 66,295 | 84,823 |
Fair Value, Recurring | Level 2 | Equity securities |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 0 | 6,802 |
Fair Value, Recurring | Level 2 | Fixed income |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 66,295 | 78,021 |
Fair Value, Recurring | Level 3 |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 0 | 0 |
Fair Value, Recurring | Level 3 | Equity securities |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | 0 | 0 |
Fair Value, Recurring | Level 3 | Fixed income |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair values of pension plan assets | $ 0 | $ 0 |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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