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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table | Pay Versus Performance The table below shows the information specified in Item 402(v) of Regulation S-K concerning the compensation of the CEO and the average compensation of the other Named Executive Officers of the Company compared to financial performance for each of fiscal years 2020, 2021, 2022, 2023 and 2024.
PAY VERSUS PERFORMANCE
Year |  | Summary Compensation Table Total for CEO (1) |  | Compensation Actually Paid to CEO (2) |  | Average Summary Compensation Table Total for Non-CEO NEOs (3) |  | Average Compensation Actually Paid to Non-CEO NEOs (2)(3) |  | Value of Initial Fixed $100 Investment Based On: |  | Net Income (in millions) |  | Company Selected Measure: Earnings Per Share (“EPS”)
| Total Shareholder Return (“TSR”) (4) |  | Peer Group Total Shareholder Return (4)
(a) |  | (b) |  | (c) |  | (d) |  | (e) |  | (f) |  | (g) |  | (h) |  | (i)
2024 |  | $2,572,032 |  | $2,398,645 |  |  |  | $877,120 |  |  |  |  | $829,811 |  |  |  |  | $102.83 |  |  |  |  | $137.73 |  |  |  |  | $47.1 |  |  |  |  | $2.93 | (5)
2023 |  | $2,625,890 |  | $2,342,445 |  |  |  | $856,767 |  |  |  |  | $651,099 |  |  |  |  | $ 96.57 |  |  |  |  | $111.59 |  |  |  |  | $45.2 |  |  |  |  | $2.82 |
2022 |  | $1,488,255 |  | $1,658,803 |  |  |  | $531,450 |  |  |  |  | $556,598 |  |  |  |  | $ 91.49 |  |  |  |  | $120.09 |  |  |  |  | $41.4 |  |  |  |  | $2.59 |
2021 |  | $2,426,750 |  | $2,224,626 |  |  |  | $578,575 |  |  |  |  | $565,779 |  |  |  |  | $ 79.47 |  |  |  |  | $118.24 |  |  |  |  | $36.1 |  |  |  |  | $2.35 |
2020 |  | $3,977,630 |  | $1,416,063 |  |  |  | $627,418 |  |  |  |  | $425,236 |  |  |  |  | $ 74.06 |  |  |  |  | $100.48 |  |  |  |  | $32.2 |  |  |  |  | $2.15 | (6)
NOTES:
| (1) | Mr. Meissner was the CEO for each of 2020, 2021, 2022, 2023, and 2024.
| (2) | SEC rules require certain adjustments must be made to the Summary Compensation Table totals to determine “compensation actually paid” as reported in the Pay versus Performance Table. Compensation actually paid (“CAP”) does not necessarily represent cash and/or equity value transferred to the applicable Named Executive Officer without restriction, but rather is a value calculated under applicable SEC rules. In general, CAP is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date), as well as an adjustment subtracting the change in pension value as of December 31 and adding the actuarially determined service cost for services rendered by the Named Executive Officer, if applicable, during the covered fiscal year. The table below details these adjustments.
COMPENSATION ACTUALLY PAID
Year |  | Executive(s) |  | Summary Compensation Table: Base Salary |  | Adjusted Equity Awards |  | Summary Compensation Table: Non-Equity Compensation |  | Change in Pension Value or Service Cost (7) |  | Summary Compensation Table: All Other Compensation |  | Total Compensation Actually Paid
(a) |  | (b) |  | (c) |  | (d) |  | (e) |  | (f) |  | (g) |  | (h)
2024 |  | CEO |  | $712,025 |  |  |  | $759,041 |  |  |  | $ | 518,354 |  |  |  | $ | 250,735 |  |  |  | $ | 158,490 |  |  |  | $ | 2,398,645 |
2024 |  | Non-CEO NEOs |  | $342,381 |  |  |  | $198,973 |  |  |  | $ | 163,726 |  |  |  | $ | 15,142 |  |  |  | $ | 109,591 |  |  |  | $ | 829,811 |
2023 |  | CEO |  | $678,119 |  |  |  | $739,078 |  |  |  | $ | 515,709 |  |  |  | $ | 251,965 |  |  |  | $ | 157,574 |  |  |  | $ | 2,342,445 |
2023 |  | Non-CEO NEOs |  | $274,566 |  |  |  | $119,704 |  |  |  | $ | 134,469 |  |  |  | $ | 27,046 |  |  |  | $ | 95,314 |  |  |  | $ | 651,099 |
2022 |  | CEO |  | $645,214 |  |  |  | $170,548 |  |  |  | $ | 521,564 |  |  |  |  | — |  |  |  | $ | 321,477 |  |  |  | $ | 1,658,803 |
2022 |  | Non-CEO NEOs |  | $300,546 |  |  |  | $ 24,995 |  |  |  | $ | 142,078 |  |  |  |  | — |  |  |  | $ | 88,979 |  |  |  | $ | 556,598 |
2021 |  | CEO |  | $620,398 |  |  |  | $652,071 |  |  |  | $ | 466,162 |  |  |  | $ | 342,315 |  |  |  | $ | 143,680 |  |  |  | $ | 2,224,626 |
2021 |  | Non-CEO NEOs |  | $261,300 |  |  |  | $ 88,533 |  |  |  | $ | 117,920 |  |  |  | $ | 26,413 |  |  |  | $ | 71,614 |  |  |  | $ | 565,779 |
2020 |  | CEO |  | $597,740 |  |  |  | ($51,818) |  |  |  | $ | 314,710 |  |  |  | $ | 273,810 |  |  |  | $ | 281,621 |  |  |  | $ | 1,416,063 |
2020 |  | Non-CEO NEOs |  | $209,913 |  |  |  | $ 10,915 |  |  |  | $ | 61,865 |  |  |  | $ | 29,926 |  |  |  | $ | 112,617 |  |  |  | $ | 425,236 |
NOTES, continued:
| (3) | In 2024, the other Named Executive Officers were Mr. Hevert, Mr. Hurstak, Mr. Eisfeller, and Mr. LeBlanc. In 2023, the other Named Executive Officers were Mr. Hevert, Mr. Hurstak, Mr. Eisfeller, Mr. LeBlanc, and Todd R. Black. Mr. Black retired from the Company on May 1, 2023. In 2022, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. Eisfeller and Mr. LeBlanc. In 2021, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. Eisfeller, Mr. LeBlanc, and Laurence M. Brock. Mr. Brock retired from the Company in July 2021. In 2020, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. LeBlanc, Mr. Brock, and Christine Vaughan. Ms. Vaughan resigned from the Company in March 2020.
| (4) | TSR is determined based on the value of an initial fixed investment of $100 at December 31, 2019. The TSR peer group consists of the S&P 500 Utilities Index. Source of data: S&P Dow Jones Indices LLC.
| (5) | Actual EPS in 2024 was $2.93. The Compensation Committee made a discretionary $0.04 adjustment to account for the financial impact of the transaction costs incurred in 2024 associated with the acquisition of Bangor Natural Gas Company.
| (6) | Actual EPS in 2020 was $2.15. The Compensation Committee made a discretionary $0.09 adjustment for compensation decisions for 2020 to account management’s performance in light of the financial impact of the COVID-19 pandemic.
| (7) | All values shown reflect the pension service cost in the applicable year.
Company Selected Measure Name | EPS |  |  |  |
Named Executive Officers, Footnote | In 2024, the other Named Executive Officers were Mr. Hevert, Mr. Hurstak, Mr. Eisfeller, and Mr. LeBlanc. | In 2023, the other Named Executive Officers were Mr. Hevert, Mr. Hurstak, Mr. Eisfeller, Mr. LeBlanc, and Todd R. Black. Mr. Black retired from the Company on May 1, 2023. | In 2022, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. Eisfeller and Mr. LeBlanc. | In 2021, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. Eisfeller, Mr. LeBlanc, and Laurence M. Brock. Mr. Brock retired from the Company in July 2021. | In 2020, the other Named Executive Officers were Mr. Hevert, Mr. Black, Mr. LeBlanc, Mr. Brock, and Christine Vaughan. Ms. Vaughan resigned from the Company in March 2020.
Peer Group Issuers, Footnote | TSR is determined based on the value of an initial fixed investment of $100 at December 31, 2019. The TSR peer group consists of the S&P 500 Utilities Index. Source of data: S&P Dow Jones Indices LLC. |  |  |  |
PEO Total Compensation Amount | $ 2,572,032 | $ 2,625,890 | $ 1,488,255 | $ 2,426,750 | $ 3,977,630
PEO Actually Paid Compensation Amount | $ 2,398,645 | 2,342,445 | 1,658,803 | 2,224,626 | 1,416,063
Adjustment To PEO Compensation, Footnote |
| (2) | SEC rules require certain adjustments must be made to the Summary Compensation Table totals to determine “compensation actually paid” as reported in the Pay versus Performance Table. Compensation actually paid (“CAP”) does not necessarily represent cash and/or equity value transferred to the applicable Named Executive Officer without restriction, but rather is a value calculated under applicable SEC rules. In general, CAP is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date), as well as an adjustment subtracting the change in pension value as of December 31 and adding the actuarially determined service cost for services rendered by the Named Executive Officer, if applicable, during the covered fiscal year. The table below details these adjustments.
COMPENSATION ACTUALLY PAID
Year |  | Executive(s) |  | Summary Compensation Table: Base Salary |  | Adjusted Equity Awards |  | Summary Compensation Table: Non-Equity Compensation |  | Change in Pension Value or Service Cost (7) |  | Summary Compensation Table: All Other Compensation |  | Total Compensation Actually Paid
(a) |  | (b) |  | (c) |  | (d) |  | (e) |  | (f) |  | (g) |  | (h)
2024 |  | CEO |  | $712,025 |  |  |  | $759,041 |  |  |  | $ | 518,354 |  |  |  | $ | 250,735 |  |  |  | $ | 158,490 |  |  |  | $ | 2,398,645 |
2024 |  | Non-CEO NEOs |  | $342,381 |  |  |  | $198,973 |  |  |  | $ | 163,726 |  |  |  | $ | 15,142 |  |  |  | $ | 109,591 |  |  |  | $ | 829,811 |
2023 |  | CEO |  | $678,119 |  |  |  | $739,078 |  |  |  | $ | 515,709 |  |  |  | $ | 251,965 |  |  |  | $ | 157,574 |  |  |  | $ | 2,342,445 |
2023 |  | Non-CEO NEOs |  | $274,566 |  |  |  | $119,704 |  |  |  | $ | 134,469 |  |  |  | $ | 27,046 |  |  |  | $ | 95,314 |  |  |  | $ | 651,099 |
2022 |  | CEO |  | $645,214 |  |  |  | $170,548 |  |  |  | $ | 521,564 |  |  |  |  | — |  |  |  | $ | 321,477 |  |  |  | $ | 1,658,803 |
2022 |  | Non-CEO NEOs |  | $300,546 |  |  |  | $ 24,995 |  |  |  | $ | 142,078 |  |  |  |  | — |  |  |  | $ | 88,979 |  |  |  | $ | 556,598 |
2021 |  | CEO |  | $620,398 |  |  |  | $652,071 |  |  |  | $ | 466,162 |  |  |  | $ | 342,315 |  |  |  | $ | 143,680 |  |  |  | $ | 2,224,626 |
2021 |  | Non-CEO NEOs |  | $261,300 |  |  |  | $ 88,533 |  |  |  | $ | 117,920 |  |  |  | $ | 26,413 |  |  |  | $ | 71,614 |  |  |  | $ | 565,779 |
2020 |  | CEO |  | $597,740 |  |  |  | ($51,818) |  |  |  | $ | 314,710 |  |  |  | $ | 273,810 |  |  |  | $ | 281,621 |  |  |  | $ | 1,416,063 |
2020 |  | Non-CEO NEOs |  | $209,913 |  |  |  | $ 10,915 |  |  |  | $ | 61,865 |  |  |  | $ | 29,926 |  |  |  | $ | 112,617 |  |  |  | $ | 425,236 |
Non-PEO NEO Average Total Compensation Amount | $ 877,120 | 856,767 | 531,450 | 578,575 | 627,418
Non-PEO NEO Average Compensation Actually Paid Amount | $ 829,811 | 651,099 | 556,598 | 565,779 | 425,236
Adjustment to Non-PEO NEO Compensation Footnote |
| (2) | SEC rules require certain adjustments must be made to the Summary Compensation Table totals to determine “compensation actually paid” as reported in the Pay versus Performance Table. Compensation actually paid (“CAP”) does not necessarily represent cash and/or equity value transferred to the applicable Named Executive Officer without restriction, but rather is a value calculated under applicable SEC rules. In general, CAP is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date), as well as an adjustment subtracting the change in pension value as of December 31 and adding the actuarially determined service cost for services rendered by the Named Executive Officer, if applicable, during the covered fiscal year. The table below details these adjustments.
COMPENSATION ACTUALLY PAID
Year |  | Executive(s) |  | Summary Compensation Table: Base Salary |  | Adjusted Equity Awards |  | Summary Compensation Table: Non-Equity Compensation |  | Change in Pension Value or Service Cost (7) |  | Summary Compensation Table: All Other Compensation |  | Total Compensation Actually Paid
(a) |  | (b) |  | (c) |  | (d) |  | (e) |  | (f) |  | (g) |  | (h)
2024 |  | CEO |  | $712,025 |  |  |  | $759,041 |  |  |  | $ | 518,354 |  |  |  | $ | 250,735 |  |  |  | $ | 158,490 |  |  |  | $ | 2,398,645 |
2024 |  | Non-CEO NEOs |  | $342,381 |  |  |  | $198,973 |  |  |  | $ | 163,726 |  |  |  | $ | 15,142 |  |  |  | $ | 109,591 |  |  |  | $ | 829,811 |
2023 |  | CEO |  | $678,119 |  |  |  | $739,078 |  |  |  | $ | 515,709 |  |  |  | $ | 251,965 |  |  |  | $ | 157,574 |  |  |  | $ | 2,342,445 |
2023 |  | Non-CEO NEOs |  | $274,566 |  |  |  | $119,704 |  |  |  | $ | 134,469 |  |  |  | $ | 27,046 |  |  |  | $ | 95,314 |  |  |  | $ | 651,099 |
2022 |  | CEO |  | $645,214 |  |  |  | $170,548 |  |  |  | $ | 521,564 |  |  |  |  | — |  |  |  | $ | 321,477 |  |  |  | $ | 1,658,803 |
2022 |  | Non-CEO NEOs |  | $300,546 |  |  |  | $ 24,995 |  |  |  | $ | 142,078 |  |  |  |  | — |  |  |  | $ | 88,979 |  |  |  | $ | 556,598 |
2021 |  | CEO |  | $620,398 |  |  |  | $652,071 |  |  |  | $ | 466,162 |  |  |  | $ | 342,315 |  |  |  | $ | 143,680 |  |  |  | $ | 2,224,626 |
2021 |  | Non-CEO NEOs |  | $261,300 |  |  |  | $ 88,533 |  |  |  | $ | 117,920 |  |  |  | $ | 26,413 |  |  |  | $ | 71,614 |  |  |  | $ | 565,779 |
2020 |  | CEO |  | $597,740 |  |  |  | ($51,818) |  |  |  | $ | 314,710 |  |  |  | $ | 273,810 |  |  |  | $ | 281,621 |  |  |  | $ | 1,416,063 |
2020 |  | Non-CEO NEOs |  | $209,913 |  |  |  | $ 10,915 |  |  |  | $ | 61,865 |  |  |  | $ | 29,926 |  |  |  | $ | 112,617 |  |  |  | $ | 425,236 |
Tabular List, Table |
Most Important Performance Measures |
Cash and Equity: 2020-2021 |
Financial |  | Earnings Per Share |  |  | 40 | %
|  | O&M Cost Per Customer |  |  | 30 | %
Safety & Reliability |  | Electric System Reliability |  |  | 10 | %
|  | Gas Emergency Response Time |  |  | 10 | %
Customer Engagement |  | Customer Satisfaction |  |  | 10 | %
Cash: 2022-2024 |
Financial |  | Earnings Per Share |  |  | 40 | %
|  | O&M Cost Per Customer |  |  | 30 | %
Safety & Reliability |  | Electric System Reliability |  |  | 10 | %
|  | Gas Emergency Response Time |  |  | 10 | %
Customer Engagement |  | Customer Satisfaction |  |  | 10 | %
Equity: 2023-2024 |
Financial |  | Three-Year Average Return on Equity |  |  | 50 | %
|  | Three-Year Average Growth in Book Value Per Share |  |  | 50 | %
Total Shareholder Return Amount | $ 102.83 | 96.57 | 91.49 | 79.47 | 74.06
Peer Group Total Shareholder Return Amount | 137.73 | 111.59 | 120.09 | 118.24 | 100.48
Net Income (Loss) | $ 47,100,000 | $ 45,200,000 | $ 41,400,000 | $ 36,100,000 | $ 32,200,000
Company Selected Measure Amount | 2.93 | 2.82 | 2.59 | 2.35 | 2.15
PEO Name | Mr. Meissner |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name |  | Financial | Financial | Financial |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name |  |  | Safety & Reliability | Safety & Reliability |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name |  |  | Customer Engagement | Customer Engagement |
PEO | Base Salary [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 712,025 | $ 678,119 | $ 645,214 | $ 620,398 | $ 597,740
PEO | Adjusted Equity Awards [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 759,041 | 739,078 | 170,548 | 652,071 | (51,818)
PEO | Non Equity Compensation [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 518,354 | 515,709 | 521,564 | 466,162 | 314,710
PEO | Pension Value Or Service Cost [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 250,735 | 251,965 |  | 342,315 | 273,810
PEO | All Other Compensation [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 158,490 | 157,574 | 321,477 | 143,680 | 281,621
Non-PEO NEO | Base Salary [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 342,381 | 274,566 | 300,546 | 261,300 | 209,913
Non-PEO NEO | Adjusted Equity Awards [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 198,973 | 119,704 | 24,995 | 88,533 | 10,915
Non-PEO NEO | Non Equity Compensation [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 163,726 | 134,469 | 142,078 | 117,920 | 61,865
Non-PEO NEO | Pension Value Or Service Cost [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 15,142 | 27,046 |  | 26,413 | 29,926
Non-PEO NEO | All Other Compensation [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 109,591 | $ 95,314 | $ 88,979 | $ 71,614 | $ 112,617

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