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Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2025

USD ($)

$ / shares

Dec. 31, 2024

USD ($)

$ / shares

Dec. 31, 2023

USD ($)

$ / shares

Dec. 31, 2022

USD ($)

$ / shares

Dec. 31, 2021

USD ($)

$ / shares

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table


PAY VERSUS PERFORMANCE TABLE
					Value of Initial Fixed $100 Investment Based on:
Year	Summary Compensation Table Total for PEO(1)	Compensation Actually Paid to PEO(2)	Average Summary Compensation Table Total for Non-PEO NEOs(1)	Average Compensation Actually Paid to Non-PEO NEOs(2)	Total Shareholder Return(3)	Peer Group Total Shareholder Return(4)	Net Income (in millions)(5)(7)	Earnings Per Share(6)(7)
2025	$4,531,322	$5,540,974	$1,334,527	$1,608,029	$127	$183	$140.3	$6.00
2024	$4,154,015	$5,276,611	$1,304,330	$1,604,065	$121	$153	$118.6	$5.28
2023	$3,269,505	$3,364,847	$1,155,639	$1,177,386	$103	$121	$87.2	$4.75
2022	$2,768,416	$1,744,451	$938,039	$646,504	$113	$129	$89.8	$5.07
2021	$2,836,970	$6,130,154	$953,892	$1,914,113	$137	$115	$83.5	$4.75

Company Selected Measure Name

Earnings Per Share

Named Executive Officers, Footnote

Total compensation for Mr. Householder and, on average, the four other NEOs as reported in the Summary Compensation Table for the five fiscal years ended 2021 through 2025, as applicable. Mr. Householder has served as President and Chief Executive Officer of the Company since 2019. The four other NEOs are as follows: Ms. Cooper and Messrs. Moriarty, Sylvester and Webber.

Peer Group Issuers, Footnote

The cumulative annual TSR of the companies in our performance peer group as established by the Compensation Committee for each of the equity awards granted in the five fiscal years ended 2021 through 2025. The peer group for 2021 and 2022 is the same as that used in the Company's Common Stock Performance Graph as reported in our Annual Report on Form 10-K for the years ended December 31, 2021 and December 31, 2022 and is comprised of the following companies: Atmos Energy Corporation, Black Hills Corporation, New Jersey Resources Corporation, NiSource Inc., Northwest Natural Holding Co., NorthWestern Corporation, ONE Gas, Inc., RGC Resources, Inc., South Jersey Industries, Inc., Spire Inc., and Unitil Corporation. The peer group for 2023, 2024 and 2025 is comprised of the same companies as the peer group for 2021 and 2022, with the exception of South Jersey Industries, Inc., which was acquired by a private investment vehicle focused on investing in critical infrastructure assets in 2023 and resultantly delisted from the NYSE. Accordingly, South Jersey Industries, Inc. was removed from the peer group. The peer group for 2023, 2024 and 2025 is the same peer group as that used in the Company's Common Stock Performance Graph as reported in our Annual Report on Form 10-K for the years ended December 31, 2023, December 31, 2024 and December 31, 2025. Peer company TSR was calculated using a weighted average based on each peer company's market capitalization at the beginning of each period for which a return is indicated in the table and is presented as the dollar value of an investment of $100 over a one, two, three, four and five year cumulative period from the market close on December 31, 2020 through the fiscal years ended December 31, 2021, December 31, 2022, December 31, 2023, December 31, 2024 and December 31, 2025.

PEO Total Compensation Amount

$ 4,531,322

$ 4,154,015

$ 3,269,505

$ 2,768,416

$ 2,836,970

PEO Actually Paid Compensation Amount

$ 5,540,974

5,276,611

3,364,847

1,744,451

6,130,154

Adjustment To PEO Compensation, Footnote

Compensation Actually Paid reflects the total compensation as reported in the Summary Compensation Table for the NEOs adjusted in accordance with Item 402(v) of Regulation S-K. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Householder's total compensation for the five fiscal years ended 2021 through 2025, as applicable, to determine Compensation Actually Paid:


ADJUSTMENTS TO TOTAL COMPENSATION TO DETERMINE CAP TO PEO
Year	Reported Summary Compensation Table Total		Subtract: Value in Stock Awards Column of the Summary Compensation Table(a)		Add: Reconciled Value of Equity Awards to PEO(b)		CAP to PEO(c)
2025	$	4,531,322	$	2,420,566	$	3,430,218	$	5,540,974
2024	$	4,154,015	$	2,026,148	$	3,148,744	$	5,276,611
2023	$	3,269,505	$	1,664,792	$	1,760,134	$	3,364,847
2022	$	2,768,416	$	1,209,353	$	185,388	$	1,744,451
2021	$	2,836,970	$	1,122,109	$	4,415,293	$	6,130,154

(a) Represents the grant date fair value of equity awards reported in the Stock Awards column in the Summary Compensation Table for the applicable year.

(b) The amounts deducted or added (as applicable) in calculating the equity award adjustments for each applicable year are provided in the Equity Reconciliation for CAP to NEOs Table below.

(c) There is no compensation that needs to be included for equity awards granted and vested in the same year, equity awards that failed to meet vesting conditions in the year ended, or dividends or other earnings paid on equity awards not otherwise reflected in total compensation for Mr. Householder. No values are shown for pension benefit adjustments because (i) there are no service costs for services rendered during the applicable years because the Pension Plan was frozen prior to the applicable years and formally terminated in 2021, and (ii) there are no prior service costs because no additional benefits were granted in a plan amendment during the applicable years. Mr. Householder did not participate in the Pension Plan. None of the NEOs participate in the Company’s non-qualified Pension SERP Plan.

The amounts added or deducted, as applicable, in reconciling the equity award adjustments included in calculating CAP to NEOs are as follows:


EQUITY RECONCILIATION FOR CAP TO PEO AND NON-PEO NEOs
	PEO								Non-PEO NEOs
Year	Year End Fair Value of Equity Awards Granted in the Year		Year Over Year Change in Fair Value of Outstanding Unvested Equity Awards Granted in Prior Years		Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year		Total Equity Award Adjustments		Year End Fair Value of Equity Awards Granted in the Year		Year Over Year Change in Fair Value of Outstanding Unvested Equity Awards Granted in Prior Years		Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year		Total Equity Award Adjustments
2025	$	1,949,633	$	1,429,806	$	50,779	$	3,430,218	$	436,824	$	365,583	$	13,433	$	815,840
2024	$	2,209,603	$	733,987	$	205,154	$	3,148,744	$	564,967	$	194,166	$	58,663	$	817,796
2023	$	1,850,652	$	298,814	$	(389,332)	$	1,760,134	$	489,564	$	85,445	$	(112,865)	$	462,144
2022	$	908,038	$	(97,810)	$	(624,840)	$	185,388	$	259,652	$	(28,354)	$	(177,021)	$	54,277
2021	$	1,868,236	$	1,685,102	$	861,955	$	4,415,293	$	541,588	$	477,399	$	266,525	$	1,285,512

The unvested equity values in the table above are computed in accordance with the methodology used for financial reporting purposes, and for unvested awards subject to performance-based vesting conditions. Performance-based vesting conditions are based on the probable outcome of such conditions as of the last day of the applicable years.

Non-PEO NEO Average Total Compensation Amount

$ 1,334,527

1,304,330

1,155,639

938,039

953,892

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,608,029

1,604,065

1,177,386

646,504

1,914,113

Adjustment to Non-PEO NEO Compensation Footnote

In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Ms. Cooper and Messrs. Moriarty, Sylvester and Webber's total compensation, on average, for the five fiscal years ended 2021 through 2025, as applicable, to determine Compensation Actually Paid:


ADJUSTMENTS TO TOTAL COMPENSATION TO DETERMINE CAP TO NON-PEO NEOs
Year	Average Reported Summary Compensation Table Total		Subtract: Average Value in Stock Awards Column of the Summary Compensation Table(a)		Subtract: Average Value in Change in Pension Value and NQDC Earnings Column of Summary Compensation Table(b)		Add: Average Reconciled Value of Equity Awards to Non-PEO NEOs(c)		Average CAP to Non-PEO NEOs(d)
2025	$	1,334,527	$	542,338	$	—	$	815,840	$	1,608,029
2024	$	1,304,330	$	518,061	$	—	$	817,796	$	1,604,065
2023	$	1,155,639	$	440,397	$	—	$	462,144	$	1,177,386
2022	$	938,039	$	345,812	$	—	$	54,277	$	646,504
2021	$	953,892	$	325,291	$	—	$	1,285,512	$	1,914,113

(a) Represents the grant date fair value of equity awards, on average, reported in the Stock Awards column for Ms. Cooper and Messrs. Moriarty, Sylvester and Webber in the Summary Compensation Table for the applicable year.

(b) None of the NEOs participated in the Pension Plan except for Ms. Cooper, who received a lump sum payout at termination of the Pension Plan in 2021, which was actuarially equivalent to Ms. Cooper's full vested accrued benefit in the Pension Plan. Ms. Cooper’s change in accumulated benefits under the Pension Plan for 2020 is reported in the applicable row of the Summary Compensation Table in the Company's Proxy Statement filed with the SEC on March 22, 2021, and in the average adjustments to total compensation for calculating CAP to the non-PEO NEOs for year-end 2020 as reflected in the Company's Proxy Statement filed with the SEC on March 25, 2025. None of the NEOs participate in the Company’s non-qualified Pension SERP Plan.

(c) The amounts deducted or added (as applicable) in calculating the equity award adjustments for each applicable year are provided in the Equity Reconciliation for CAP to Non-PEO NEOs Table below.

(d) There is no compensation that needs to be included for equity awards granted and vested in the same year, equity awards that failed to meet vesting conditions in the year ended, or dividends or other earnings paid on equity awards not otherwise reflected in total compensation for the NEOs. No values are shown for pension benefit adjustments because (i) there are no service costs for services rendered during the applicable years because the Pension Plan was frozen prior to the applicable years and formally terminated in 2021, and (ii) there are no prior service costs because no additional benefits were granted in a plan amendment during the applicable years.

The amounts added or deducted, as applicable, in reconciling the equity award adjustments included in calculating CAP to NEOs are as follows:


EQUITY RECONCILIATION FOR CAP TO PEO AND NON-PEO NEOs
	PEO								Non-PEO NEOs
Year	Year End Fair Value of Equity Awards Granted in the Year		Year Over Year Change in Fair Value of Outstanding Unvested Equity Awards Granted in Prior Years		Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year		Total Equity Award Adjustments		Year End Fair Value of Equity Awards Granted in the Year		Year Over Year Change in Fair Value of Outstanding Unvested Equity Awards Granted in Prior Years		Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year		Total Equity Award Adjustments
2025	$	1,949,633	$	1,429,806	$	50,779	$	3,430,218	$	436,824	$	365,583	$	13,433	$	815,840
2024	$	2,209,603	$	733,987	$	205,154	$	3,148,744	$	564,967	$	194,166	$	58,663	$	817,796
2023	$	1,850,652	$	298,814	$	(389,332)	$	1,760,134	$	489,564	$	85,445	$	(112,865)	$	462,144
2022	$	908,038	$	(97,810)	$	(624,840)	$	185,388	$	259,652	$	(28,354)	$	(177,021)	$	54,277
2021	$	1,868,236	$	1,685,102	$	861,955	$	4,415,293	$	541,588	$	477,399	$	266,525	$	1,285,512

Compensation Actually Paid vs. Total Shareholder Return

The following graphs demonstrate the relationship between CAP and TSR, CAP and Net Income, and CAP and EPS, in each case, to our CEO and to the average of the Non-PEO NEOs.

Compensation Actually Paid vs. Net Income

Net Income as reflected above represents the Company's Net Income on a GAAP basis and includes transaction and transition related expenses attributable to the Company's acquisition of Florida City Gas in late 2023. Adjusted Net Income for the three fiscal years ended 2023, 2024 and 2025, excluding transaction and transition related expenses, was $97.8 million, $121.5 million, and $141.1 million, respectively.

Compensation Actually Paid vs. Company Selected Measure

*Earnings Per Share as reflected above represents the Company's Basic EPS on a GAAP basis and includes transaction and transition related expenses attributable to the Company's acquisition of Florida City Gas in late 2023.

Total Shareholder Return Vs Peer Group

The following graphs demonstrate the relationship between CAP and TSR, CAP and Net Income, and CAP and EPS, in each case, to our CEO and to the average of the Non-PEO NEOs.

Tabular List, Table


Tabular List of the Most Important Financial Performance Measures Used to Link CAP to NEOs for the Most Recently Completed Fiscal Year to Company Performance
•			Earnings Per Share
•			Growth in Long-Term Earnings (calculated as total expenditures as a percent of total capitalization)
•			Average Return on Equity (ROE)

Total Shareholder Return Amount

$ 127

121

103

113

137

Peer Group Total Shareholder Return Amount

183

153

121

129

115

Net Income (Loss)

$ 140,300,000

$ 118,600,000

$ 87,200,000

$ 89,800,000

$ 83,500,000

Company Selected Measure Amount | $ / shares

6.00

5.28

4.75

5.07

4.75

PEO Name

Mr. Householder

Additional 402(v) Disclosure

Cumulative TSR is calculated by dividing the sum of the cumulative amount of dividends for the measurement period, assuming dividend reinvestment, and the difference between our stock price at the end and the beginning of the measurement period by our stock price at the beginning of the measurement period. The Company's cumulative annual TSR represents the dollar value of an investment of $100 over a one, two, three, four and five year cumulative period from the market close on December 31, 2020 through the fiscal years ended December 31, 2021, December 31, 2022, December 31, 2023, December 31, 2024 and December 31, 2025.Net Income as reported in our Annual Report on Form 10-K for the years ended December 31, 2021, December 31, 2022, December 31, 2023, December 31, 2024 and December 31, 2025.While we use numerous financial and non-financial performance measures for the purpose of evaluating performance for our executive compensation programs, we have determined that Earnings Per Share is the financial performance measure that, in our assessment, represents the most important performance measure we used to link compensation actually paid to our NEOs for the most recently completed fiscal year to Company performance. Basic Earnings Per Share is as reported in our Annual Report on Form 10-K for the years ended December 31, 2021, December 31, 2022, December 31, 2023, December 31, 2024 and December 31, 2025.Net Income and Earnings Per Share as reflected in the applicable columns of the Pay Versus Performance Table represent the Company's Net Income and Basic EPS on a GAAP basis and include transaction and transition related expenses attributable to the Company's acquisition of Florida City Gas in late 2023. Adjusted Net Income for the three fiscal years ended 2023, 2024 and 2025, excluding transaction and transition related expenses, was $97.8 million, $121.5 million, and $141.1 million, respectively. Adjusted Basic EPS for the three fiscal years ended 2023, 2024 and 2025, excluding transaction and transition related expenses, was $5.33 per share, $5.41 per share, and $6.03 per share, respectively.

Measure:: 1

Pay vs Performance Disclosure

Name

Earnings Per Share

Measure:: 2

Pay vs Performance Disclosure

Name

Growth in Long-Term Earnings (calculated as total expenditures as a percent of total capitalization)

Measure:: 3

Pay vs Performance Disclosure

Name

Average Return on Equity (ROE)