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Retirement Plans (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 31, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Retirement Plans [Abstract] |  |  |  |  |
Service period of participants not impacted by pension plan amendment |  |  |  | 15 years |
Age of plan participants not impacted by pension plan amendment |  |  |  | 50 years |
Service period of participants who are age fifty not impacted by pension plan amendment |  |  |  | 10 years |
Higman [Member] |  |  |  |  |
Retirement Plans [Abstract] |  |  |  |  |
Pension contributions |  |  |  | $ 500 |
Higman [Member] | Subsequent Event [Member] |  |  |  |  |
Retirement Plans [Abstract] |  |  |  |  |
Pension contributions | $ 200 |  |  |  |
Pension Plan [Member] |  |  |  |  |
Components of net periodic benefit cost [Abstract] |  |  |  |  |
Service cost |  | $ 1,658 | $ 2,053 | 3,269 | $ 3,980
Interest cost |  | 3,640 | 3,535 | 7,362 | 7,119
Expected return on plan assets |  | 7,154 | 6,559 | (14,296) | (13,133)
Amortization of actuarial loss (gain) |  | (132) | (790) | 242 | 1,888
Net periodic benefit cost |  | (1,724) | (181) | 3,423 | 146
SERP [Member] |  |  |  |  |
Components of net periodic benefit cost [Abstract] |  |  |  |  |
Service cost |  |  |  | 0 | 0
Interest cost |  | 8 | 7 | 15 | 15
Expected return on plan assets |  |  |  | 0 | 0
Amortization of actuarial loss (gain) |  | (8) | (10) | 15 | 20
Net periodic benefit cost |  | 16 | 17 | $ 30 | 35
Other Postretirement Benefits Plan [Member] |  |  |  |  |
Retirement Plans [Abstract] |  |  |  |  |
Pension plan defined benefit plan cost increase limit percentage |  |  |  | 4.00% |
Components of net periodic benefit cost [Abstract] |  |  |  |  |
Interest cost |  | 4 | 4 | $ 8 | 8
Amortization of actuarial loss (gain) |  | 99 | 112 | 197 | 225
Net periodic benefit cost |  | $ (95) | $ (108) | $ (189) | $ (217)

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- Definition The age of eligible participants of the employee pension plan who will be grandfathered and not be impacted by the amendment to the pension plan. + References No definition available. + Details
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- Definition The service period of eligible participants of the employee pension plan who have reached the age of fifty that will be grandfathered and not be impacted by the amendment to the pension plan. + References No definition available. + Details
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- Definition The service period of eligible participants of the employee pension plan who will be grandfathered and not be impacted by the amendment to the pension plan. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: 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 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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