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Postretirement Benefit Plans - Net Funded Status (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Postretirement Health And Life Coverage |  |  |  |
Change in benefit obligations: |  |  |  |
Benefit obligations, beginning of period |  | $ 399,000 | $ 342,000 |
Service cost |  | 2,000 | 2,000 | $ 3,000
Interest cost |  | 8,000 | 9,000 | 13,000
Change in experience |  | (30,000) | 73,000 |
Change in assumptions |  | (67,000) | (5,000) |
Benefit payments |  | (15,000) | (22,000) |
Benefit obligations, end of period | $ 399,000 | 297,000 | 399,000 | 342,000
Change in fair value of plan assets: |  |  |  |
Fair value of plan assets, beginning of period |  | 0 | 0 |
Employer contributions |  | 15,000 | 22,000 |
Benefit payments |  | (15,000) | (22,000) |
Fair value of plan assets, end of period | 0 |  | 0 | 0
Funded status at year end | (399,000) | (297,000) | (399,000) |
Director's Retirement Plan |  |  |  |
Change in benefit obligations: |  |  |  |
Benefit obligations, beginning of period |  | 1,195,000 | 1,142,000 |
Service cost |  | 75,000 | 47,000 | 49,000
Interest cost |  | 30,000 | 26,000 | 31,000
Actuarial loss |  | 103,000 | 61,000 |
Change in assumptions |  | (23,000) | 25,000 |
Benefit payments |  | (81,000) | (106,000) |
Benefit obligations, end of period | 1,195,000 | 1,299,000 | 1,195,000 | 1,142,000
Change in fair value of plan assets: |  |  |  |
Fair value of plan assets, beginning of period |  | 0 | 0 |
Employer contributions |  | 81,000 | 106,000 |
Benefit payments |  | (81,000) | (106,000) |
Fair value of plan assets, end of period | 0 | 0 | 0 | 0
Funded status at year end | (1,195,000) | (1,299,000) | (1,195,000) |
Scottdale Defined Benefit Pension Plan |  |  |  |
Change in benefit obligations: |  |  |  |
Benefit obligations, beginning of period |  | 4,844,000 | 5,401,000 |
Service cost |  | 69,000 | 83,000 |
Interest cost |  | 144,000 | 134,000 |
Actuarial loss |  | (1,096,000) | (309,000) |
Settlement payments |  | 0 | (378,000) |
Benefit payments |  | (156,000) | (87,000) |
Benefit obligations, end of period | 4,844,000 | 3,805,000 | 4,844,000 | 5,401,000
Change in fair value of plan assets: |  |  |  |
Fair value of plan assets, beginning of period |  | 5,302,000 | 4,939,000 |
Return on plan assets |  | (385,000) | 582,000 |
Employer contributions |  | 0 | 285,000 |
Benefit payments |  | (156,000) | (87,000) |
Administrative expenses |  | (39,000) | (39,000) |
Settlement payments |  | 0 | (378,000) |
Fair value of plan assets, end of period | 5,302,000 | 4,722,000 | 5,302,000 | $ 4,939,000
Funded status at year end | 458,000 | 917,000 | 458,000 |
Riverview Defined Benefit Plan |  |  |  |
Change in benefit obligations: |  |  |  |
Benefit obligations, beginning of period | 8,278,000 | 8,165,000 |  |
Interest cost | 19,000 | 223,000 |  |
Actuarial loss | (86,000) | (1,407,000) |  |
Benefit payments | (46,000) | (557,000) |  |
Benefit obligations, end of period | 8,165,000 | 6,424,000 | 8,165,000 |
Change in fair value of plan assets: |  |  |  |
Fair value of plan assets, beginning of period | 8,894,000 | 8,984,000 |  |
Return on plan assets | 136,000 | (1,709,000) |  |
Employer contributions | 0 | 2,000 |  |
Benefit payments | (46,000) | (557,000) |  |
Fair value of plan assets, end of period | 8,984,000 | 6,720,000 | 8,984,000 |
Funded status at year end | $ 819,000 | $ 296,000 | $ 819,000 |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + 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 (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + 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 (a)(6) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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