Chesapeake Utilities (CPK) 10-Q 7 Nov 24 2024 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2024	Nov. 04, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-11590
Entity Registrant Name	CHESAPEAKE UTILITIES CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0064146
Entity Address, Address Line One	500 Energy Lane
Entity Address, City or Town	Dover
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19901
City Area Code	302
Local Phone Number	734-6799
Title of 12(b) Security	Common Stock - par value per share $0.4867
Trading Symbol	CPK
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		22,780,819,000
Entity Central Index Key	0000019745
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues
Regulated Energy		$ 130,633	$ 102,411	$ 429,684	$ 345,822
Unregulated Energy		35,567	34,970	160,089	158,886
Total Operating Revenues		160,138	131,547	572,154	485,269
Operating Expenses
Natural gas and electric costs		28,366	26,518	105,662	105,692
Propane and natural gas costs		9,835	10,576	53,396	55,786
Operations		49,519	41,217	153,418	128,147
Transaction-related expenses		819	3,899	3,114	3,899
Maintenance		5,062	5,125	16,526	15,487
Depreciation and amortization		16,851	17,610	51,744	52,096
Other taxes		8,768	6,374	27,001	20,674
Total Operating Expenses		119,220	111,319	410,861	381,781
Total operating income		40,918	20,228	161,293	103,488
Other income (expense), net		400	(72)	1,705	1,036
Interest charges		17,022	7,076	50,861	21,272
Income Before Income Taxes		24,296	13,080	112,137	83,252
Income taxes		6,789	3,673	30,191	21,368
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
Weighted Average Common Shares Outstanding:
Basic (shares)	[1]	22,501,000	17,797,000	22,346,000	17,784,000
Diluted (shares)		22,564,000	17,858,000	22,402,000	17,847,000
Earnings Per Share of Common Stock:
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.78	$ 0.53	$ 3.67	$ 3.48
Basic (in dollars per share)		0.78	0.53	3.67	3.48
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share		0.78	0.53	3.66	3.47
Diluted (in dollars per share)		$ 0.78	$ 0.53	$ 3.66	$ 3.47
Other Operating Revenue		$ (6,062)	$ (5,834)	$ (17,619)	$ (19,439)
[1] (1) Weighted average shares for the three and nine months ended September 30, 2024 reflect the impact of 4.4 million common shares issued in November 2023 in connection with the acquisition of FCG. See Notes 3 and 9 for additional details on the acquisition and related equity offering.

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 17,507	$ 9,407	$ 81,946	$ 61,884
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $1, $3, $10 and $10, respectively	14	11	41	32
Other comprehensive income (loss)	(2,559)	1,922	(1,397)	242
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	14,948	11,329	80,549	62,126
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(1,088)	(26)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			1,088	26
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(309)	268
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $1, $3, $10 and $10, respectively	14	11	41	32
Net Income	17,507	9,407	81,946	61,884
Other comprehensive income (loss)	(2,559)	1,922	(1,397)	242
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	14,948	11,329	80,549	62,126
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(176)	(118)	(431)	(260)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	176	118	431	260
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	63	328	(698)	202
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(63)	(328)	698	(202)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(609)	1,385	1,031	(660)
Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(431)	(260)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			431	260
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ (1,851)	$ 316	$ (1,340)	$ 928

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Other Comprehensive Income [Abstract]
Amortization of prior service cost, tax	$ 1	$ 3	$ 10	$ 10
Net gain, tax	0	0	0	0
Unrealized (loss)/gain on commodity contract cash flow hedges, tax	(225)	525	381	(250)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	(634)	112	(459)	325
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service cost, tax	1	3	10	10
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	0	0	0	0
Unrealized (loss)/gain on commodity contract cash flow hedges, tax	(225)	525	381	(250)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	(634)	112	(459)	325
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Statement of Other Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	24	124	(258)	76
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	24	124	(258)	76
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Statement of Other Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(61)	(42)	(148)	(92)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ (61)	$ (42)	$ (148)	$ (92)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment
Regulated Energy	$ 2,600,087	$ 2,418,494
Unregulated Energy	426,127	410,807
Other businesses and eliminations	32,136	30,310
Total property, plant and equipment	3,058,350	2,859,611
Less: Accumulated depreciation and amortization	(556,421)	(516,429)
Property, Plant and Equipment, Net	2,658,109	2,456,374
Current Assets
Cash and cash equivalents	1,609	4,904
Trade and other receivables	54,374	71,786
Accounts Receivable, Allowance for Credit Loss, Current	(2,739)	(2,699)
Accounts Receivable, before Allowance for Credit Loss, Current	57,113	74,485
Accrued revenue	23,634	32,597
Propane inventory, at average cost	6,781	9,313
Other inventory, at average cost	21,139	19,912
Regulatory assets	20,446	19,506
Storage gas prepayments	4,339	4,695
Income taxes receivable	12,563	3,829
Prepaid expenses	18,965	15,407
Derivative assets, at fair value	405	1,027
Other current assets	2,232	2,723
Total current assets	166,487	185,699
Deferred Charges and Other Assets
Goodwill	507,852	508,174
Other intangible assets, net	15,475	16,865
Investments, at fair value	14,156	12,282
Operating Lease, Right-of-Use Asset	10,945	12,426
Regulatory assets	81,899	96,396
Receivables and other deferred charges	12,147	16,448
Total deferred charges and other assets	642,596	662,631
Total Assets	3,467,192	3,304,704
Stockholders’ equity
Preferred stock, par value $0.01 per share (authorized 2,000 shares), no shares issued and outstanding	0	0
Common stock, par value $0.4867 per share (authorized 50,000 shares)	11,085	10,823
Additional paid-in capital	812,896	749,356
Retained earnings	528,426	488,663
Accumulated other comprehensive loss	(4,135)	(2,738)
Deferred compensation obligation	9,775	9,050
Treasury stock	(9,775)	(9,050)
Total stockholders’ equity	1,348,272	1,246,104	[1]
Total capitalization	2,521,228	2,433,179
Current Liabilities
Less: current maturities	18,522	18,505
Short-term borrowing	214,753	179,853
Accounts payable	70,138	77,481
Customer deposits and refunds	47,408	46,427
Accrued interest	13,776	7,020
Dividends payable	14,492	13,119
Accrued compensation	14,495	16,544
Regulatory liabilities	14,762	13,719
Derivative liabilities, at fair value	633	354
Other accrued liabilities	25,832	13,362
Total current liabilities	434,811	386,384
Deferred Credits and Other Liabilities
Deferred income taxes	289,208	259,082
Regulatory liabilities	190,512	195,279
Environmental liabilities	2,441	2,607
Other pension and benefit costs	16,327	15,330
Operating Lease, Liability, Noncurrent	9,157	10,550
Deferred investment tax credits and other liabilities	1,478	1,366
Total deferred credits and other liabilities	511,153	485,141
Environmental and other commitments and contingencies (Notes 5 and 6)
Total Capitalization and Liabilities	3,467,192	3,304,704
Other businesses and eliminations	32,136	30,310
Property, Plant and Equipment, Gross	3,058,350	2,859,611
Construction Work in Progress	156,180	113,192
Property, Plant and Equipment, Net	2,658,109	2,456,374
Trade and other receivables	54,374	71,786
Income taxes receivable	12,563	3,829
Other current assets	2,232	2,723
Assets, Current	166,487	185,699
Receivables and other deferred charges	12,147	16,448
Deferred Charges And Other Assets	642,596	662,631
Total identifiable assets	3,467,192	3,304,704
Regulated Energy	2,600,087	2,418,494
Unregulated Energy	426,127	410,807
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	556,421	516,429
Cash and cash equivalents	1,609	4,904
Accounts Receivable, before Allowance for Credit Loss, Current	57,113	74,485
Allowance for uncollectible accounts	2,739	2,699
Accrued revenue	23,634	32,597
Propane inventory, at average cost	6,781	9,313
Other inventory, at average cost	21,139	19,912
Regulatory assets	20,446	19,506
Storage gas prepayments	4,339	4,695
Prepaid expenses	18,965	15,407
Derivative assets, at fair value	405	1,027
Goodwill	507,852	508,174
Other intangible assets, net	15,475	16,865
Investments, at fair value	14,156	12,282
Operating Lease, Right-of-Use Asset	10,945	12,426
Regulatory assets	81,899	96,396
Preferred stock, par value $0.01 per share (authorized 2,000 shares), no shares issued and outstanding	0	0
Stockholders' Equity Attributable to Parent	1,348,272	1,246,104	[1]
Capitalization, Long-term Debt and Equity	2,521,228	2,433,179
Accounts payable	70,138	77,481
Other accrued liabilities	25,832	13,362
Liabilities, Current	434,811	386,384
Regulatory liabilities	190,512	195,279
Operating Lease, Liability, Noncurrent	9,157	10,550
Deferred investment tax credits and other liabilities	1,478	1,366
Deferred Credits and Other Liabilities	511,153	485,141
Environmental and other commitments and contingencies (Notes 5 and 6)
Liabilities and Equity	3,467,192	3,304,704
Common stock, par value $0.4867 per share (authorized 50,000 shares)	11,085	10,823
Additional paid-in capital	812,896	749,356
Retained earnings	528,426	488,663
Accumulated other comprehensive loss	(4,135)	(2,738)
Deferred compensation obligation	9,775	9,050
Treasury Stock, Value	9,775	9,050
Long-term Debt and Capital Lease Obligations, Net of Current Maturities	1,172,956	1,187,075
Less: current maturities	18,522	18,505
Short-term borrowing	214,753	179,853
Customer deposits and refunds	47,408	46,427
Accrued interest	13,776	7,020
Dividends payable	14,492	13,119
Accrued compensation	14,495	16,544
Regulatory liabilities	14,762	13,719
Energy Marketing Contract Liabilities, Current	633	354
Deferred income taxes	289,208	259,082
Environmental liabilities	2,441	2,607
Other pension and benefit costs	16,327	15,330
Energy Marketing Contracts Assets, Noncurrent	122	40
Energy Marketing Contract Liabilities, Noncurrent	2,030	$ 927
Accrued compensation	$ (2,331)
[1] Includes 4.4 million shares issued during 2023 related to the acquisition of FCG. See Notes 3 and 9 for details associated with the FCG acquisition and related financing.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 2,739	$ 2,699
Common stock, par value (in dollars per share)	$ 486.7	$ 0.4867
Common stock, shares authorized (shares)	50,000,000,000	50,000,000,000
Preferred Stock, Shares Authorized	2,000,000	2,000,000,000
Preferred Stock, Par or Stated Value Per Share	$ 10	$ 10
Preferred Stock, Shares Issued	0	0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities
Net Income	$ 81,946	$ 61,884
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,744	52,096
Depreciation and accretion included in other costs	11,562	8,562
Deferred income taxes	30,589	8,297
Realized loss on commodity contracts and sale of assets	(3,801)	(883)
Unrealized gain on investments and commodity contracts	(1,696)	(821)
Employee benefits and compensation	(72)	315
Share-based compensation	6,449	4,857
Changes in assets and liabilities:
Accounts receivable and accrued revenue	26,313	31,866
Propane inventory, storage gas and other inventory	1,661	2,968
Regulatory assets and liabilities, net	5,095	33,492
Prepaid expenses and other current assets	(391)	(2,765)
Accounts payable and other accrued liabilities	6,475	(11,128)
Income taxes receivable	(8,734)	(2,799)
Customer deposits and refunds	981	3,076
Accrued compensation	(2,331)	(5,103)
Other assets and liabilities, net	5,318	(2,203)
Net cash provided by operating activities	217,668	183,347
Investing Activities
Property, plant and equipment expenditures	(259,586)	(137,684)
Proceeds from sale of assets	3,142	2,651
Environmental expenditures	166	710
Net cash used in investing activities	(256,007)	(135,743)
Financing Activities
Common stock dividends	(39,888)	(29,509)
Issuance of stock under the Dividend Reinvestment Plan, net of offering fees	56,749	(28)
Tax withholding payments related to net settled stock compensation	(1,466)	(2,455)
Change in cash overdrafts due to outstanding checks	1,412	(2,157)
Net borrowings (repayments) under line of credit agreements	32,869	(81,697)
Proceeds from long-term debt, net of offering fees	(107)	79,840
Repayment of long-term debt	(14,525)	(16,009)
Net cash provided by (used in) financing activities	35,044	(52,015)
Net Decrease in Cash and Cash Equivalents	(3,295)	(4,411)
Cash and Cash Equivalents—Beginning of Period	4,904	6,204
Cash and Cash Equivalents—End of Period	1,609	1,793
Payments to Acquire Businesses, Gross	603	0
Accrued compensation	(2,331)	(5,103)
Net Income	81,946	61,884
Depreciation and amortization	51,744	52,096
Depreciation and accretion included in other costs	11,562	8,562
Deferred Income Tax Expense (Benefit)	30,589	8,297
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	3,801	883
Unrealized Gain (Loss) on Commodity Contracts	1,696	821
Employee benefits and compensation	(72)	315
Share-based compensation	6,449	4,857
Other Noncash Expense	(195)	0
Increase (Decrease) in Accounts Receivable	(26,313)	(31,866)
Increase (Decrease) in Inventories	(1,661)	(2,968)
Increase (Decrease) in Regulatory Assets and Liabilities	(5,095)	(33,492)
Increase (Decrease) in Prepaid Expense and Other Assets	391	2,765
Accounts payable and other accrued liabilities	6,475	(11,128)
Increase (Decrease) in Income Taxes Receivable	8,734	2,799
Customer deposits and refunds	981	3,076
Increase (Decrease) in Interest Payable, Net	6,755	1,636
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(5,318)	2,203
Net Cash Provided by (Used in) Operating Activities	217,668	183,347
Payments to Acquire Property, Plant, and Equipment	259,586	137,684
Proceeds from sale of assets	3,142	2,651
Environmental expenditures	166	710
Net cash used in investing activities	(256,007)	(135,743)
Payments of Ordinary Dividends, Common Stock	39,888	29,509
Issuance of stock under the Dividend Reinvestment Plan, net of offering fees	56,749	(28)
Payment, Tax Withholding, Share-based Payment Arrangement	1,466	2,455
Change in cash overdrafts due to outstanding checks	1,412	(2,157)
Net borrowings (repayments) under line of credit agreements	32,869	(81,697)
Proceeds from long-term debt, net of offering fees	107	(79,840)
Repayments of Long-term Debt	14,525	16,009
Net cash provided by (used in) financing activities	35,044	(52,015)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(3,295)	(4,411)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,609	$ 1,793

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total		Common Stock [Member]		Additional Paid-In Capital [Member]		Retained Earnings [Member]		Accumulated Other Comprehensive Loss [Member]	Deferred Compensation [Member]		Treasury Stock, Preferred	Treasury Stock, Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		108,000
Common Stock, Dividends, Per Share, Declared		$ 1.715
Beginning Balances (shares) at Dec. 31, 2022	[1],[2]			17,741,000
Beginning Balances at Dec. 31, 2022		$ 832,801		$ 8,635	[1]	$ 380,036		$ 445,509		$ (1,379)	$ 7,060			$ (7,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		61,884						61,884
Other comprehensive income (loss)		242								242
Other Comprehensive Income (Loss), Net of Tax		242
Dividend declared		(30,792)						(30,792)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]			$ 0	[1]	(21)
Share-based compensation (shares)	[1],[2],[4],[5]			56,000
Share-based compensation and tax benefit		(21)	[3]	$ 27	[1],[4],[5]	2,536	[4],[5]
Treasury stock activities		2,563	[4],[5]					0	[2]		1,927	[2]		(1,927)	[2]
Ending Balances (shares) at Sep. 30, 2023	[1],[2]			17,797,000
Ending Balances at Sep. 30, 2023		$ 866,677		$ 8,662	[1]	382,551		476,601		(1,137)	8,987			(8,987)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		20,000
Common Stock, Dividends, Per Share, Declared		$ 0.590
Beginning Balances (shares) at Jun. 30, 2023	[1],[2]			17,797,000
Beginning Balances at Jun. 30, 2023		$ 864,228		$ 8,662	[1]	380,830		477,795		(3,059)	9,001		$ (9,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		9,407						9,407
Other comprehensive income (loss)		1,922								1,922
Other Comprehensive Income (Loss), Net of Tax		1,922
Dividend declared		(10,601)						(10,601)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	(2)		$ 0	[1]	(2)
Share-based compensation (shares)	[1],[2],[4],[5]			0
Share-based compensation and tax benefit	[4],[5]	1,723		$ 0	[1]	1,723
Treasury stock activities								0			(14)			14
Ending Balances (shares) at Sep. 30, 2023	[1],[2]			17,797,000
Ending Balances at Sep. 30, 2023		$ 866,677		$ 8,662	[1]	382,551		476,601		(1,137)	8,987			(8,987)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		107,000
Preferred Stock, Shares Authorized		2,000,000,000
Preferred Stock, Par or Stated Value Per Share		$ 10
Shares Held In Trust For Deferred Compensation Plan		108,000
Common Stock, Dividends, Per Share, Declared		$ 1.870
Beginning Balances (shares) at Dec. 31, 2023	[1],[2],[6]			22,235,000
Beginning Balances at Dec. 31, 2023	[6]	$ 1,246,104		$ 10,823	[1]	749,356		488,663		(2,738)	9,050			(9,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		81,946						81,946
Other comprehensive income (loss)		(1,397)								(1,397)
Other Comprehensive Income (Loss), Net of Tax		(1,397)
Dividend declared		(42,183)						(42,183)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			502,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	58,551		$ 244	[1]	58,307
Share-based compensation (shares)	[1],[2],[4],[5]			36,000
Share-based compensation and tax benefit	[4],[5]	5,251		$ 18	[1]	5,233
Treasury stock activities	[2]							0			725			(725)
Ending Balances (shares) at Sep. 30, 2024	[1],[2]			22,773,000
Ending Balances at Sep. 30, 2024		$ 1,348,272		$ 11,085	[1]	812,896		528,426		(4,135)	9,775			(9,775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		14,000
Proceeds from Issuance of Senior Long-Term Debt		$ 550,000		$ 4,400
Common Stock, Dividends, Per Share, Declared		$ 0.640
Beginning Balances (shares) at Jun. 30, 2024	[1],[2]			22,299,000
Beginning Balances at Jun. 30, 2024		$ 1,290,554		$ 10,854	[1]	755,751		525,525		(1,576)	9,703		$ (9,703)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		17,507						17,507
Other comprehensive income (loss)		(2,559)								(2,559)
Other Comprehensive Income (Loss), Net of Tax		(2,559)
Dividend declared		(14,606)						(14,606)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			474,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	55,659		$ 231	[1]	55,428
Share-based compensation (shares)	[1],[2],[4],[5]			0
Share-based compensation and tax benefit	[4],[5]	1,717		$ 0	[1]	1,717
Treasury stock activities								0			72			(72)
Ending Balances (shares) at Sep. 30, 2024	[1],[2]			22,773,000
Ending Balances at Sep. 30, 2024		$ 1,348,272		$ 11,085	[1]	$ 812,896		$ 528,426		$ (4,135)	$ 9,775			$ (9,775)
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		113,000
[1] 2.0 million shares of preferred stock at $0.01 par value have been authorized. No shares have been issued or are outstanding; accordingly, no information has been included in the Condensed Consolidated Statements of Stockholders’ Equity. Includes 113 thousand, 108 thousand, 107 thousand, and 108 thousand shares at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan. Includes shares issued under the Retirement Savings Plan and DRIP as applicable. Includes amounts for shares issued for directors’ compensation. The shares issued under the SICP are net of shares withheld for employee taxes. For the nine months ended September 30, 2024 and 2023, we withheld 14 thousand and 20 thousand shares, respectively, for employee taxes. Includes 4.4 million shares issued during 2023 related to the acquisition of FCG. See Notes 3 and 9 for details associated with the FCG acquisition and related financing.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Unaudited) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividend declared (in dollars per share)	$ 0.640	$ 0.590	$ 1.870	$ 1.715
Deferred compensation plan held Rabbi Trust (shares)	113,000	107,000	113,000	107,000	108,000	108,000
Preferred Stock, Shares Authorized	2,000,000		2,000,000		2,000,000,000
Preferred Stock, Par or Stated Value Per Share	$ 10		$ 10		$ 10
Shares issued under the performance incentive plan withheld for employee taxes (shares)			14,000	20,000

Summary of Accounting Policies

Summary of Accounting Policies	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Summary of Accounting Policies	Summary of Accounting Policies Basis of Presentation References in this document to the “Company,” “Chesapeake Utilities,” “we,” “us” and “our” are intended to mean Chesapeake Utilities Corporation, its divisions and/or its subsidiaries, as appropriate in the context of the disclosure. The accompanying unaudited condensed consolidated financial statements have been prepared in compliance with the rules and regulations of the SEC and GAAP. In accordance with these rules and regulations, certain information and disclosures normally required for audited financial statements have been condensed or omitted. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto, included in our latest Annual Report on Form 10-K for the year ended December 31, 2023. In the opinion of management, these financial statements reflect all adjustments that are necessary for a fair presentation of our results of operations, financial position and cash flows for the interim periods presented. Where necessary to improve comparability, prior period amounts have been reclassified to conform to current period presentation. Due to the seasonality of our business, results for interim periods are not necessarily indicative of results for the entire fiscal year. Revenue and earnings are typically greater during the first and fourth quarters, when consumption of energy is highest due to colder temperatures. Recent Accounting Standards Yet to be Adopted FASB Segment Reporting (ASC 280) - In November 2023, the FASB issued ASU 2023-07, Improvements to Reportable Segments Disclosures , which modifies required disclosures about a public entity’s reportable segments and addresses requests from investors for more detailed information about a reportable segment’s expenses and a more comprehensive reconciliation of each segment's reported profit or loss. ASU 2023-07 will be effective for our annual financial statements beginning January 1, 2024 and our interim financial statements beginning January 1, 2025. ASU 2023-07 only impacts disclosures, and as a result, will not have a material impact on our financial position or results of operations. Income Taxes (ASC 740) - In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures,

Calculation of Earnings Per Sha

Calculation of Earnings Per Share	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Calculation of Earnings Per Share	Calculation of Earnings Per Share Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands, except per share data) Calculation of Basic Earnings Per Share: Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 Weighted average shares outstanding (1) 22,501 17,797 22,346 17,784 Basic Earnings Per Share $ 0.78 $ 0.53 $ 3.67 $ 3.48 Calculation of Diluted Earnings Per Share: Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 Reconciliation of Denominator: Weighted shares outstanding—Basic (1) 22,501 17,797 22,346 17,784 Effect of dilutive securities—Share-based compensation 63 61 56 63 Adjusted denominator—Diluted 22,564 17,858 22,402 17,847 Diluted Earnings Per Share $ 0.78 $ 0.53 $ 3.66 $ 3.47

Acquisitions and Divestitures (

Acquisitions and Divestitures (Notes)	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Business Combination Disclosure [Text Block]	3. Acquisitions Acquisition of Florida City Gas On November 30, 2023, we completed the acquisition of FCG for $922.8 million in cash, which included working capital adjustments as defined in the agreement that were settled during the first quarter of 2024, pursuant to the stock purchase agreement with Florida Power & Light Company. Upon completion of the acquisition, FCG became a wholly-owned subsidiary of the Company and is included within our Regulated Energy segment. FCG serves approximately 120,000 residential and commercial natural gas customers across eight counties in Florida, including Miami-Dade, Broward, Brevard, Palm Beach, Hendry, Martin, St. Lucie and Indian River. Its natural gas system includes approximately 3,800 miles of distribution main and 80 miles of transmission pipe.

Revenue Recognition (Notes)

Revenue Recognition (Notes)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition We recognize revenue when our performance obligations under contracts with customers have been satisfied, which generally occurs when our businesses have delivered or transported natural gas, electricity or propane to customers. We exclude sales taxes and other similar taxes from the transaction price. Typically, our customers pay for the goods and/or services we provide in the month following the satisfaction of our performance obligation. The following tables display our revenue by major source based on product and service type for the three and nine months ended September 30, 2024 and 2023: Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 9,479 $ — $ — $ 9,479 $ 9,793 $ — $ — $ 9,793 Florida natural gas distribution 36,941 — — 36,941 38,323 — — 38,323 Florida City Gas 33,449 — — 33,449 — — — — FPU electric distribution 29,856 — — 29,856 32,683 — — 32,683 Maryland natural gas division 3,343 — — 3,343 3,447 — — 3,447 Sandpiper natural gas/propane operations 3,925 — — 3,925 3,748 — — 3,748 Elkton Gas 1,024 — — 1,024 1,011 — — 1,011 Total energy distribution 118,017 — — 118,017 89,005 — — 89,005 Energy transmission Aspire Energy — 4,576 — 4,576 — 4,798 — 4,798 Aspire Energy Express 373 — — 373 373 — — 373 Eastern Shore 19,538 — — 19,538 19,228 — — 19,228 Peninsula Pipeline 9,005 — — 9,005 7,904 — — 7,904 Total energy transmission 28,916 4,576 — 33,492 27,505 4,798 — 32,303 Energy generation Eight Flags — 4,242 — 4,242 — 4,437 — 4,437 Propane operations Propane delivery operations — 22,929 — 22,929 — 23,197 — 23,197 CNG / RNG Services Marlin Gas Services — 3,832 — 3,832 — 2,595 — 2,595 Other RNG — 51 — 51 — — — — Total CNG / RNG Services — 3,883 — 3,883 — 2,595 — 2,595 Other and eliminations Eliminations (16,300) (63) (6,107) (22,470) (14,099) (57) (5,879) (20,035) Other — 45 45 — — 45 45 Total other and eliminations (16,300) (63) (6,062) (22,425) (14,099) (57) (5,834) (19,990) Total operating revenues (1) $ 130,633 $ 35,567 $ (6,062) $ 160,138 $ 102,411 $ 34,970 $ (5,834) $ 131,547 (1) Total operating revenues for the three months ended September 30, 2024 include other revenue (revenues from sources other than contracts with customers) of $0.2 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, and $0.1 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, for the three months ended September 30, 2023. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for the Maryland division and Sandpiper Energy and late fees. Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 54,800 $ — $ — $ 54,800 $ 60,809 $ — $ — $ 60,809 Florida natural gas distribution 124,814 — — 124,814 125,446 — — 125,446 Florida City Gas 101,820 — — 101,820 — — — — FPU electric distribution 72,366 — — 72,366 78,455 — — 78,455 Maryland natural gas division 17,879 — — 17,879 20,331 — — 20,331 Sandpiper natural gas/propane operations 14,880 — — 14,880 14,909 — — 14,909 Elkton Gas 5,191 — — 5,191 6,454 — — 6,454 Total energy distribution 391,750 — — 391,750 306,404 — — 306,404 Energy transmission Aspire Energy — 23,515 — 23,515 — 24,478 — 24,478 Aspire Energy Express 1,110 — — 1,110 1,106 — — 1,106 Eastern Shore 60,664 — — 60,664 59,530 — — 59,530 Peninsula Pipeline 25,066 — — 25,066 22,408 — — 22,408 Total energy transmission 86,840 23,515 — 110,355 83,044 24,478 — 107,522 Energy generation Eight Flags — 13,261 — 13,261 — 14,269 — 14,269 Propane operations Propane delivery operations — 112,541 — 112,541 — 110,492 — 110,492 CNG / RNG Services Marlin Gas Services — 10,907 — 10,907 — 9,834 — 9,834 Other RNG — 51 — 51 — — — — Total CNG / RNG Services — 10,958 — 10,958 — 9,834 — 9,834 Other and eliminations Eliminations (48,906) (186) (17,755) (66,847) (43,626) (187) (19,575) (63,388) Other — — 136 136 — — 136 136 Total other and eliminations (48,906) (186) (17,619) (66,711) (43,626) (187) (19,439) (63,252) Total operating revenues (1) $ 429,684 $ 160,089 $ (17,619) $ 572,154 $ 345,822 $ 158,886 $ (19,439) $ 485,269 (1) Total operating revenues for the nine months ended September 30, 2024 include other revenue (revenues from sources other than contracts with customers) of $0.9 million and $0.3 million for our Regulated and Unregulated Energy segments, respectively, and $0.9 million and $0.3 million for our Regulated and Unregulated Energy segments, respectively, for the nine months ended September 30, 2023. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for the Maryland division and Sandpiper Energy and late fees. Contract Balances The timing of revenue recognition, customer billings and cash collections results in trade receivables, unbilled receivables (contract assets), and customer advances (contract liabilities) in our condensed consolidated balance sheets. The balances of our trade receivables, contract assets, and contract liabilities as of September 30, 2024 and December 31, 2023 were as follows: Trade Receivables Contract Assets (Current) Contract Assets (Non-current) Contract Liabilities (Current) (in thousands) Balance at 12/31/2023 $ 67,741 $ 18 $ 3,524 $ 1,022 Balance at 9/30/2024 47,744 18 3,133 1,243 Increase (Decrease) $ (19,997) $ — $ (391) $ 221 Our trade receivables are included in trade and other receivables in the condensed consolidated balance sheets. Our current contract assets are included in other current assets in the condensed consolidated balance sheets. Our non-current contract assets are included in receivables and other deferred charges in the condensed consolidated balance sheets and primarily relate to operations and maintenance costs incurred by Eight Flags that have not yet been recovered through rates for the sale of electricity to our electric distribution operation pursuant to a long-term service agreement. At times, we receive advances or deposits from our customers before we satisfy our performance obligation, resulting in contract liabilities. Contract liabilities are included in other accrued liabilities in the condensed consolidated balance sheets and relate to non-refundable prepaid fixed fees for our propane distribution operation's retail offerings. Our performance obligation is satisfied over the term of the respective customer retail program on a ratable basis. For the three and nine months ended September 30, 2024 and 2023, the amounts recognized in revenue were not material. Remaining Performance Obligations Certain of our businesses have long-term fixed fee contracts with customers in which revenues are recognized when performance obligations are satisfied over the contract term. Revenue for these businesses for the remaining performance obligations, at September 30, 2024, are expected to be recognized as follows: (in thousands) 2024 2025 2026 2027 2028 2029 2030 and thereafter Eastern Shore and Peninsula Pipeline $ 9,154 $ 33,144 $ 29,072 $ 25,578 $ 23,499 $ 21,294 $ 125,881 Natural gas distribution operations 2,679 10,549 10,073 8,602 8,598 8,555 26,406 FPU electric distribution 187 749 364 364 364 — — Total revenue contracts with remaining performance obligations $ 12,020 $ 44,442 $ 39,509 $ 34,544 $ 32,461 $ 29,849 $ 152,287

Rates and Other Regulatory Acti

Rates and Other Regulatory Activities	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Public Utilities Disclosure [Text Block]	Rates and Other Regulatory Activities Our natural gas and electric distribution operations in Delaware, Maryland and Florida are subject to regulation by their respective PSC; Eastern Shore, our natural gas transmission subsidiary, is subject to regulation by the FERC; and Peninsula Pipeline and Aspire Energy Express, our intrastate pipeline subsidiaries, are subject to regulation (excluding cost of service) by the Florida PSC and Public Utilities Commission of Ohio, respectively. Delaware In September 2023, the Delaware Division submitted the Energy Efficiency Rider application for natural gas with the Delaware PSC after obtaining an affirmative recommendation from the Delaware Energy Efficiency Advisory Council (“EEAC”). The application was the first in the state and included four programs including, Home Energy Counseling, Home Performance with Energy Star, Assisted Home Performance with Energy Star, and a standard Offer Program in which customers can participate and allow for recovery. In April 2024 all programs, with the exception of the Offer Program, were approved by the PSC and rates became effective May 1, 2024. Delaware Natural Gas Rate Case: In August 2024, our Delaware natural gas division filed an application for a natural gas rate case with the Delaware PSC. In connection with the application, we are seeking approval of the following: (i) permanent rate relief of approximately $12.1 million with a return on equity ("ROE") of 11.5 percent; (ii) proposed changes to depreciation rates which were part of a depreciation study also submitted with the filing; and (iii) authorization to make certain changes to tariffs. In September 2024, interim rates were approved by the Delaware PSC in the amount of $2.5 million on an annualized basis effective in October 2024. The discovery process has commenced and hearing for the proceeding has been scheduled for May 2025. The outcome of the application is subject to review and approval by the Delaware PSC. Maryland Maryland Natural Gas Rate Case: In January 2024, our natural gas distribution businesses in Maryland, CUC-Maryland Division, Sandpiper Energy, Inc., and Elkton Gas Company (collectively, “Maryland natural gas distribution businesses”), filed a joint application for a natural gas rate case with the Maryland PSC. In connection with the application, we are seeking approval of the following: (i) permanent rate relief of approximately $6.9 million with a ROE of 11.5 percent; (ii) authorization to make certain changes to tariffs to include a unified rate structure and to consolidate the Maryland natural gas distribution businesses which we anticipate will be called Chesapeake Utilities of Maryland, Inc.; and (iii) authorization to establish a rider for recovery of the costs associated with our new technology systems. In August 2024, the Maryland natural gas distribution businesses, the Maryland Office of Peoples' Counsel ("OPC") and PSC Staff reached a settlement agreement which provided for, among other things, an increase in annual base rates of $2.6 million. In September 2024, the Maryland Public Utility Judge issued an order approving the settlement agreement in part. The $2.6 million increase in annual base rates was approved and the Company will file a Phase II filing to determine rate design across the Maryland natural gas distribution businesses, consolidation of the applicable tariffs and recovery of technology costs. The outcome of the application is subject to review and approval by the Maryland PSC. Maryland Natural Gas Depreciation Study: In January 2024, our Maryland natural gas distribution businesses filed a joint petition for approval of their proposed unified depreciation rates with the Maryland PSC. A settlement agreement between the Company, PSC staff and the OPC was reached and the final order approving the settlement agreement went into effect in July 2024, with new depreciation rates effective as of January 1, 2023. The approved depreciation rates will result in an annual reduction in depreciation expense of approximately $1.2 million. Florida Wildlight Expansion: In August 2022, Peninsula Pipeline and FPU filed a joint petition with the Florida PSC for approval of its Transportation Service Agreement associated with the Wildlight planned community located in Nassau County, Florida. The project enables us to meet the significant growing demand for service in Yulee, Florida. The agreement enables us to construct the project during the build-out of the community and charge the reservation rate as each phase of the project goes into service. Construction of the pipeline facilities will occur in two separate phases. Phase one consists of three extensions with associated facilities, and a gas injection interconnect with associated facilities. Phase two will consist of two additional pipeline extensions. The various phases of the project commenced in the first quarter of 2023, with construction on the overall project continuing through 2025. The petition was approved by the Florida PSC in November 2022. FCG Natural Gas Rate Case: In May 2022, FCG filed a general base rate increase with the Florida PSC based on a projected 2023 test year. In June 2023, the Florida PSC issued an order approving a single total base revenue increase of $23.3 million (which included an incremental increase of $14.1 million, a previously approved increase of $3.8 million for a liquefied natural gas facility, and $5.3 million to transfer the SAFE investments from a rider clause to base rates), with new rates becoming effective as of May 1, 2023. The Florida PSC also approved FCG's proposed RSAM with a $25.0 million reserve amount, continuation and expansion of the capital SAFE program, implementation of an automated metering infrastructure pilot, and continuation of the storm damage reserve with a target reserve of $0.8 million. In June 2023, the Florida OPC filed a motion for reconsideration of the PSC’s approval of RSAM, which was denied in September 2023. In July 2023, the Florida OPC filed a notice of appeal with the Florida Supreme Court, which is pending. The Florida OPC filed their initial brief in January 2024 with answer briefs filed in April 2024. Oral arguments in the case are scheduled for December 2024. The RSAM is recorded as either an increase or decrease to accrued removal costs which is reflected on the Company’s balance sheets and a corresponding increase or decrease to depreciation and amortization expense. In order to earn the targeted regulatory return on equity ("ROE") in each reporting period subject to the conditions of the effective rate agreement, RSAM is calculated using a trailing thirteen-month average of rate base and capital structure in conjunction with the trailing twelve-month regulatory base net operating income, which primarily includes the base portion of rates and other revenues, net of operations and maintenance expenses, depreciation and amortization, interest and tax expenses. In general, the net impact of these income statement line items is adjusted, in part, by RSAM or its reversal to earn the targeted regulatory ROE. For the three and nine months ended September 30, 2024, the Company recorded decreases to asset removal costs and depreciation expense of $3.2 million and $8.9 million, respectively, as a result of the RSAM adjustment. Storm Protection Plan: In 2020, the Florida PSC implemented the Storm Protection Plan ("SPP") and Storm Protection Plan Cost Recovery Clause ("SPPCRC") rules, which require electric utilities to petition the Florida PSC for approval of a Transmission and Distribution Storm Protection Plan that covers the utility’s immediate 10-year planning period with updates to the plan at least every 3 years. The SPPCRC rules allow the utility to file for recovery of associated costs for the SPP. Our Florida electric distribution operation’s initial SPP plan was filed during the first quarter of 2022 and approved in the fourth quarter of 2022, with modifications, by the Florida PSC. Rates associated with this initiative were effective in January 2023. The Florida PSC voted to approve the projections in November 2023. FPU projects to spend $13.6 million on the program in 2024 for both capital and operating expenses associated with the program. In October 2024, the Florida PSC approved the Company's projected 2025 SPP costs of $20.4 million for both capital and operating expenses. GUARD Program : In February 2023, FPU filed a petition with the Florida PSC for approval of the GUARD program. GUARD is a ten-year program to enhance the safety, reliability, and accessibility of portions of our natural gas distribution system. We identified various categories of projects to be included in GUARD, which include the relocation of mains and service lines located in rear easements and other difficult to access areas to the front of the street, the replacement of problematic distribution mains, service lines, and maintenance and repair equipment and system reliability projects. In August 2023, the Florida PSC approved the GUARD program, which included $205.0 million of capital expenditures projected to be spent over a 10-year period. FCG SAFE Program : In June 2023, the Florida PSC issued the approval order for the continuation of the SAFE program beyond its 2025 expiration date and inclusion of 150 miles of additional mains and services located in rear property easements. The SAFE program is designed to relocate certain mains and facilities associated with rear lot easements to street front locations to improve FCG's ability to inspect and maintain the facilities and reduce opportunities for damage and theft. In the same order, the Florida PSC approved a replacement of 160 miles of pipe that was used in the 1970s and 1980s and shown through industry research to exhibit premature failure in the form of cracking. The program includes projected capital expenditures of $205.0 million over a 10-year period. In April 2024, FCG filed a petition with the Florida PSC to more closely align the SAFE Program with FPU's GUARD program. Specifically, the requested modifications will enable FCG to accelerate remediation related to problematic pipe and facilities consisting of obsolete and exposed pipe. These efforts will serve to improve the safety and reliability of service to FCG's customers and the modifications will increase the total projected capital expenditures to $50.0 million in capital expenditures associated with the SAFE Program, which would increase the total projected capital expenditures to approximately $255.0 million over a 10-year period. The Florida PSC approved the modifications in September 2024. Newberry Expansion : In April 2023, Peninsula Pipeline filed a petition with the Florida PSC for approval of its Transportation Service Agreement with FPU for an additional 8,000 Dts/d of firm service in the Newberry, Florida area. The petition was approved by the Florida PSC in the third quarter of 2023. Peninsula Pipeline will construct a pipeline extension, which will be used by FPU to support the development of a natural gas distribution system to provide gas service to the City of Newberry. A filing to address the acquisition and conversion of existing Company owned propane community gas systems in Newberry was made in November 2023. The Florida PSC approved it in April 2024 and conversions of the community gas systems in the second quarter of 2024. East Coast Reinforcement Projects: In December 2023, Peninsula Pipeline filed a petition with the Florida PSC for approval of its Transportation Service Agreements with FPU for projects that will support additional supply to communities on the East Coast of Florida. The projects are driven by the need for increased supply to coastal portions of the state that are experiencing significant population growth. Peninsula Pipeline will construct several pipeline extensions which will support FPU’s distribution system in the areas of Boynton Beach and New Smyrna Beach with an additional 15,000 Dts/d and 3,400 Dts/d, respectively. The Florida PSC approved the projects in March 2024. Construction is projected to be complete in the first and second quarters of 2025 for Boynton Beach and New Smyrna Beach, respectively. Central Florida Reinforcement Projects : In February 2024, Peninsula Pipeline filed a petition with the Florida PSC for its Transportation Service Agreements with FPU for projects that will support additional supply to communities located in Central Florida. The projects are driven by the need for increased supply to communities in central Florida that are experiencing significant population growth. Peninsula Pipeline will construct several pipeline extensions which will support FPU's distribution system around the Plant City and Lake Mattie areas of Florida with an additional 5,000 Dts/d and 8,700 Dts/d, respectively. The Florida PSC approved the projects in May 2024. Completion of the projects is projected for the fourth quarter of 2024 for Plant City and the fourth quarter of 2025 for Lake Mattie. Renewable Natural Gas Supply Projects : In February 2024, Peninsula Pipeline filed a petition with the Florida PSC for approval of Transportation Service Agreements with FCG for projects that will support the transportation of additional renewable energy supply to FCG. The projects, located in Florida’s Brevard, Indian River and Miami-Dade counties, will bring renewable natural gas produced from local landfills into FCG’s natural gas distribution system. Peninsula Pipeline will construct several pipeline extensions which will support FCG's distribution system in Brevard County, Indian River County, and Miami-Dade County. Benefits of these projects include increased gas supply to serve expected FCG growth, strengthened system reliability and additional system flexibility. The Florida PSC approved the petition at its July 2024 meeting with the projects estimated to be completed in the first half of 2025. St. Cloud Project Amendment : In February 2024, Peninsula Pipeline filed a petition with the Florida PSC for approval of an amendment to its Transportation Service Agreement with FPU for a project that will support additional supply to communities in the St. Cloud, Florida area. The project is driven by the need to expand gas service to future communities that are expected in that area. Peninsula Pipeline will construct pipeline expansions that will allow FPU to serve the expected new growth. The expansion will provide FPU with an additional 10,000 Dts/d. The Florida PSC approved the project in May 2024, and it is expected to be complete in the fourth quarter of 2025. Pioneer Supply Header Pipeline Project : In March 2024, Peninsula Pipeline filed a petition with the Florida PSC for approval of Firm Transportation Service Agreements with both FCG and FPU for a project that will support greater supply growth of natural gas service in southeast Florida. The project consists of the transfer of a pipeline asset from FCG to Peninsula Pipeline. Peninsula Pipeline will proceed to provide transportation service to both FCG and FPU using the pipeline asset, which supports continued customer growth and system reinforcement of these distribution systems. The Florida PSC approved the petition in July 2024. Miami Inner Loop Projects: In September 2024, Peninsula Pipeline filed a petition with the Florida PSC for approval of the Transportation Service Agreement with FCG for a series of projects that will enhance the infrastructure in Miami-Dade county. The proposed expansion consists of the development of several pipeline projects to support growth and support FCG's distribution system in the area and also enhance FCG's ability to obtain gas from various access points in the Miami-Dade county area. FPU Electric Rate Case : In August 2024, our Florida Electric division filed a petition with the Florida PSC seeking a general base rate increase of $12.6 million with a ROE of 11.3 percent based on a 2025 projected test year. The outcome of the application will be subject to review and approval by the Florida PSC. In October 2024, annualized interim rates of approximately $1.8 million, were approved with an effective date of November 1, 2024. Eastern Shore Worcester Resiliency Upgrade: In August 2023, Eastern Shore filed an application with the FERC requesting authorization to construct the Worcester Resiliency Upgrade, which consists of a mixture of storage and transmission facilities in Sussex County, DE and Wicomico, Worcester, and Somerset Counties in Maryland. The project will provide long-term incremental supply necessary to support the growing demand of the participating shippers. Eastern Shore has requested certificate authorization by December 2024, with a target in-service date by the third quarter of 2025. In December 2023, the FERC issued its schedule for preparation of the Environmental Assessment ("EA"). In April 2024, the FERC issued their EA with no significant impacts noted. The EA comment period closed in May 2024, and Eastern Shore responded to the one adverse comment received. TCJA

Environmental Commitments and C

Environmental Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Environmental Remediation Obligations [Abstract]
Environmental Commitments and Contingencies	Environmental Commitments and Contingencies We are subject to federal, state and local laws and regulations governing environmental quality and pollution control. These laws and regulations require us to remove or remediate, at current and former operating sites, the effect on the environment of the disposal or release of specified substances. MGP Sites We have participated in the investigation, assessment or remediation of, and have exposures at, seven former MGP sites. We have received approval for recovery of clean-up costs in rates for sites located in Salisbury, Maryland; Seaford, Delaware; and Winter Haven, Key West, Pensacola, Sanford and West Palm Beach, Florida. As of September 30, 2024 and December 31, 2023, we had approximately $3.4 million and $3.6 million, respectively, in environmental liabilities related to the former MGP sites, and related regulatory assets of approximately $0.3 million and $0.5 million at the respective balance sheet dates for future recovery of environmental costs from customers. Environmental liabilities for our MGP sites are recorded on an undiscounted basis based on the estimate of future costs provided by independent consultants. We continue to expect that all costs related to environmental remediation and related activities, including any potential future remediation costs for which we do not currently have approval for regulatory recovery, will be recoverable from customers through rates. Remediation is ongoing for the MGPs in Winter Haven and Key West in Florida and in Seaford, Delaware. The remaining clean-up costs are estimated to range from $0.3 million to $0.8 million for these three sites. The Environmental Protection Agency has approved a "site-wide ready for anticipated use" status for the Sanford, Florida MGP site, which is the final step before delisting a site. The remaining remediation expenses for the Sanford MGP site are not material. The remedial actions approved by the Florida Department of Environmental Protection have been implemented on the east parcel of our West Palm Beach Florida site. Similar remedial actions have been initiated on the site's west parcel, and construction of active remedial systems are expected to be completed in 2024. Remaining remedial costs for West Palm Beach, including completion of the construction of the system on the west parcel, are estimated to take between five and fifteen years of operation, maintenance and monitoring, and final site work for closeout of the property is estimated to be between $3.0 million and $5.4 million.

Other Commitments and Contingen

Other Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Other Commitments and Contingencies	Other Commitments and Contingencies Natural Gas, Electric and Propane Supply In March 2023, our Delmarva Peninsula natural gas distribution operations entered into asset management agreements with a third party to manage their natural gas transportation and storage capacity. The agreements were effective as of April 1, 2023 and expire in March 2026. FPU natural gas distribution operations and Eight Flags have separate asset management agreements with Emera Energy Services, Inc. to manage their natural gas transportation capacity. These agreements commenced in November 2020 and expire in October 2030. Florida Natural Gas has firm transportation service contracts with FGT and Gulfstream. Pursuant to a capacity release program approved by the Florida PSC, all of the capacity under these agreements has been released to various third parties. Under the terms of these capacity release agreements, Chesapeake Utilities is contingently liable to FGT and Gulfstream should any party, that acquired the capacity through release, fail to pay the capacity charge. To date, Chesapeake Utilities has not been required to make a payment resulting from this contingency. FPU’s electric supply contracts require FPU to maintain an acceptable standard of creditworthiness. FPU’s agreement with Florida Power & Light Company requires FPU to meet or exceed a debt service coverage ratio of 1.25 times based on the results of the prior 12 months. If FPU fails to meet this standard, it must provide an Adequate Assurance of Performance which can include an irrevocable letter of credit, a prepayment, a security interest in an asset or a performance bond or guaranty. As of September 30, 2024, FPU was in compliance with all of the requirements of its supply contracts. Eight Flags provides electricity and steam generation services through its CHP plant located on Amelia Island, Florida. In June 2016, Eight Flags began selling power generated from the CHP plant to FPU pursuant to a 20-year power purchase agreement for distribution to our electric customers. In July 2016, Eight Flags also started selling steam, pursuant to a separate 20-year contract, to the landowner on which the CHP plant is located. The CHP plant is powered by natural gas transported by FPU through its distribution system and Peninsula Pipeline through its intrastate pipeline. Corporate Guarantees The Board of Directors has authorized us to issue corporate guarantees securing obligations of our subsidiaries and to obtain letters of credit securing our subsidiaries' obligations. The maximum authorized liability under such guarantees and letters of credit as of September 30, 2024 was $35.0 million. The aggregate amount guaranteed related to our subsidiaries at September 30, 2024 was $27.5 million with the guarantees expiring on various dates through September 2025. In addition, the Board has authorized us to issue specific purpose corporate guarantees. The amount of specific purpose guarantees outstanding at September 30, 2024 was $4.0 million.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Segment Information	Segment Information We use the management approach to identify operating segments. We organize our business around differences in regulatory environment and/or products or services, and the operating results of each segment are regularly reviewed by the chief operating decision maker, our President and Chief Executive Officer, in order to make decisions about resources and to assess performance. Our operations are entirely domestic and are comprised of two reportable segments: • Regulated Energy . Includes energy distribution and transmission services (natural gas distribution, natural gas transmission and electric distribution operations). All operations in this segment are regulated, as to their rates and services, by the PSC having jurisdiction in each operating territory or by the FERC in the case of Eastern Shore. • Unregulated Energy. Includes energy transmission, energy generation (the operations of our Eight Flags' CHP plant), propane distribution operations, mobile compressed natural gas distribution and pipeline solutions operations, and sustainable energy investments including renewable natural gas. Also included in this segment are other unregulated energy services, such as energy-related merchandise sales and heating, ventilation and air conditioning, plumbing and electrical services. These operations are unregulated as to their rates and services. The remainder of our operations are presented as “Other businesses and eliminations,” which consists of unregulated subsidiaries that own real estate leased to Chesapeake Utilities, as well as certain corporate costs not allocated to other operations. The following tables present financial information about our reportable segments: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands) Operating Revenues, Unaffiliated Customers Regulated Energy $ 130,157 $ 101,911 $ 425,084 $ 344,190 Unregulated Energy 29,981 29,636 147,070 141,079 Total operating revenues, unaffiliated customers $ 160,138 $ 131,547 $ 572,154 $ 485,269 Intersegment Revenues (1) Regulated Energy $ 476 $ 500 $ 4,600 $ 1,632 Unregulated Energy 5,586 5,333 13,019 17,807 Other businesses 45 45 136 136 Total intersegment revenues $ 6,107 $ 5,878 $ 17,755 $ 19,575 Operating Income (Loss) Regulated Energy $ 43,935 $ 24,912 $ 142,549 $ 91,828 Unregulated Energy (3,061) (4,723) 18,606 11,529 Other businesses and eliminations 44 39 138 131 Operating income 40,918 20,228 161,293 103,488 Other income (expense), net 400 (72) 1,705 1,036 Interest charges 17,022 7,076 50,861 21,272 Income Before Income Taxes 24,296 13,080 112,137 83,252 Income taxes 6,789 3,673 30,191 21,368 Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 (1) All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues. (in thousands) September 30, 2024 December 31, 2023 Identifiable Assets Regulated Energy segment $ 2,967,280 $ 2,781,581 Unregulated Energy segment 448,024 477,402 Other businesses and eliminations 51,888 45,721 Total Identifiable Assets $ 3,467,192 $ 3,304,704

Stockholder's Equity - Accumula

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity Common Stock Issuances In November 2023, in connection with our acquisition of FCG, we completed an equity offering resulting in the issuance of approximately 4.4 million shares of our common stock at a price per share of $82.72 (net of underwriter discounts and commissions). We received net proceeds of $366.4 million which were used to partially finance the acquisition. We maintain an effective shelf registration statement with the SEC for the issuance of shares under our DRIP and other plans. Depending on our capital needs and subject to market conditions, we may issue additional shares under the direct stock purchase component of the DRIP in addition to other possible debt and equity offerings. For the nine months ended September 30, 2024, we received net proceeds of $56.8 million for issuances under the DRIP. There were no issuances under the DRIP during 2023. Our most recent ATM equity program, which allowed us to issue and sell shares of our common stock up to an aggregate offering price of $75.0 million, expired in June 2023. Accumulated Other Comprehensive Loss Defined benefit pension and postretirement plan items, unrealized gains (losses) of our propane swap agreements designated as commodity contract cash flow hedges, and the unrealized gains (losses) of our interest rate swap agreements designated as cash flow hedges are the components of our accumulated other comprehensive loss. The following tables present the changes in the balances of accumulated other comprehensive loss components as of September 30, 2024 and 2023. All amounts in the following tables are presented net of tax. Defined Benefit Commodity Interest Rate Pension and Contract Swap Postretirement Cash Flow Cash Flow Plan Items Hedges Hedges Total (in thousands) As of December 31, 2023 $ (2,584) $ (274) $ 120 $ (2,738) Other comprehensive income (loss) before reclassifications — 1,031 (1,340) (309) Amounts reclassified from accumulated other comprehensive income (loss) 41 (698) (431) (1,088) Net current-period other comprehensive income (loss) 41 333 (1,771) (1,397) As of September 30, 2024 $ (2,543) $ 59 $ (1,651) $ (4,135) As of December 31, 2022 $ (2,506) $ 1,092 $ 35 $ (1,379) Other comprehensive income (loss) before reclassifications — (660) 928 268 Amounts reclassified from accumulated other comprehensive income (loss) 32 202 (260) (26) Net prior-period other comprehensive income (loss) 32 (458) 668 242 As of September 30, 2023 $ (2,474) $ 634 $ 703 $ (1,137) Deferred gains or losses for our commodity contract and interest rate swap cash flow hedges are recognized in earnings upon settlement and are included in the effects of gains and losses from derivative instruments. See Note 12, Derivative Instruments , for additional details. Amortization of the net loss related to the defined benefit pension plan and postretirement plans is included in the computation of net periodic cost (benefit). See Note 10, Employee Benefit Plans , for additional details.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation Our key employees and non-employee directors have been granted share-based awards through our SICP, which has awards outstanding under the current 2023 plan and the previous 2013 plan. We record these share-based awards as compensation costs over the respective service period for which services are received in exchange for an award of equity or equity-based compensation. The compensation cost is based primarily on the fair value of the shares awarded, using the estimated fair value of each share on the date it was granted, and the number of shares to be issued at the end of the service period. The table below presents the amounts included in net income related to share-based compensation expense for the three and nine months ended September 30, 2024 and 2023: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands) Awards to key employees $ 1,717 $ 1,724 $ 5,797 $ 4,164 Awards to non-employee directors 220 214 652 693 Total compensation expense 1,937 1,938 6,449 4,857 Less: tax benefit (495) (501) (1,647) (1,255) Share-based compensation amounts included in net income $ 1,442 $ 1,437 $ 4,802 $ 3,602 Officers and Key Employees Our Compensation Committee is authorized to grant our key employees the right to receive awards of shares of our common stock contingent upon the achievement of established performance goals and subject to SEC transfer restrictions once awarded. Our President and CEO has the right to issue awards of shares of our common stock to other officers and key employees of the Company contingent upon various performance goals and subject to SEC transfer restrictions. We currently have several outstanding multi-year performance awards, which are based upon the successful achievement of long-term goals, growth and financial results and comprise both market-based and performance-based conditions and targets. The fair value per share, tied to a performance-based condition or target, is equal to the market price per share on the grant date. For the market-based conditions, we used the Monte Carlo valuation to estimate the fair value of each share granted. The table below presents the summary of the stock activity for awards to key employees for the nine months ended September 30, 2024: (in thousands, except per share data) Number of Shares Weighted Average Outstanding—December 31, 2023 213 $ 117.74 Granted 110 $ 105.21 Vested (43) $ 103.95 Expired (27) $ 86.24 Outstanding—September 30, 2024 253 $ 117.96 During the nine months ended September 30, 2024, we granted awards of 110 thousand shares of common stock to officers and key employees under the SICP, including awards granted in February 2024. The shares granted are multi-year awards that will vest no later than the three-year service period ending December 31, 2026. In March 2024, upon the election by certain of our executive officers and key employees, we withheld shares with a value at least equivalent to each such executive officer’s minimum statutory obligation for applicable income and other employment taxes related to shares that vested and were paid in March 2024 for the performance period ended December 31, 2023. We paid the balance of such awarded shares to each such executive officer and remitted cash equivalent to the withheld shares to the appropriate taxing authorities. We withheld 14 thousand shares based on the value of the shares on their award date. Total combined payments for the employees’ tax obligations to the taxing authorities were approximately $1.5 million. At September 30, 2024, the aggregate intrinsic value of the SICP awards granted to key employees was approximately $31.5 million. At September 30, 2024, there was approximately $9.0 million of unrecognized compensation cost related to these awards, which will be recognized through 2026. Non-employee Directors Shares granted to non-employee directors are issued in advance of the directors’ service periods and are fully vested as of the grant date. We record a deferred expense equal to the fair value of the shares issued and amortize the expense equally over a service period of one year or less. Our directors receive an annual retainer of shares of common stock under the SICP for services rendered through the subsequent Annual Meeting of Shareholders. Accordingly, our directors that served on the Board as of May 2024 each received approximately 1 thousand shares of common stock, respectively, with a weighted average fair value of $110.53 per share. At September 30, 2024, there was $0.5 million of unrecognized compensation expense related to shares granted to non-employee directors. This expense will be recognized over the remaining service period ending in May 2025.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments We use derivative and non-derivative contracts to manage risks related to obtaining adequate supplies and the price fluctuations of natural gas, electricity and propane and to mitigate interest rate risk. Our natural gas, electric and propane distribution operations have entered into agreements with suppliers to purchase natural gas, electricity and propane for resale to our customers. Our natural gas gathering and transmission company has entered into contracts with producers to secure natural gas to meet its obligations. Purchases under these contracts typically either do not meet the definition of derivatives or are considered “normal purchases and normal sales” and are accounted for on an accrual basis. Our propane distribution operations may also enter into fair value hedges of their inventory or cash flow hedges of their future purchase commitments in order to mitigate the impact of wholesale price fluctuations. Occasionally, we may enter into interest rate swap agreements to mitigate risk associated with changes in short-term borrowing rates. As of September 30, 2024, our natural gas and electric distribution operations did not have any outstanding derivative contracts. Volume of Derivative Activity As of September 30, 2024, the volume of our commodity derivative contracts were as follows: Business unit Commodity Contract Type Quantity hedged (in millions) Designation Longest Expiration date of hedge Sharp Propane (gallons) Purchases 13.1 Cash flow hedges March 2027 Sharp entered into futures and swap agreements to mitigate the risk of fluctuations in wholesale propane index prices associated with the propane volumes that are expected to be purchased and/or sold during the heating season. Under the futures and swap agreements, Sharp will receive the difference between (i) the index prices (Mont Belvieu prices in June 2024 through March 2027) and (ii) the per gallon propane swap prices, to the extent the index prices exceed the contracted prices. If the index prices are lower than the contract prices, Sharp will pay the difference. We designated and accounted for the propane swaps as cash flow hedges. The change in the fair value of the swap agreements is recorded as unrealized gain (loss) in other comprehensive income (loss) and later recognized in the statement of income in the same period and in the same line item as the hedged transaction. The amount of unrealized losses that we expect to reclassify from accumulated other comprehensive income (loss) related to our commodity cash flow hedges to earnings during the 12-month period ended September 30, 2025 is not material. Interest Rate Swap Activities We manage interest rate risk by entering into derivative contracts to hedge the variability in cash flows attributable to changes in the short-term borrowing rates. In September 2022, we entered into an interest rate swap with a notional amount of $50.0 million through September 2025, with pricing of 3.98 percent. In August 2024, we entered into an additional interest rate swap through August 2029, at a notional amount of $50.0 million and pricing of 3.97 percent. Our interest rate swaps are cash settled monthly as the counter-party pays us the 30-day SOFR rate less the fixed rate. We designate and account for interest rate swaps as cash flow hedges. Accordingly, unrealized gains and losses associated with the interest rate swap are recorded as a component of accumulated other comprehensive income (loss). When the interest rate swap settles, the realized gain or loss is recorded in the income statement and is recognized as a component of interest charges. Broker Margin Futures exchanges have contract specific margin requirements that require the posting of cash or cash equivalents relating to traded contracts. Margin requirements consist of initial margin that is posted upon the initiation of a position, maintenance margin that is usually expressed as a percent of initial margin, and variation margin that fluctuates based on the daily mark-to-market relative to maintenance margin requirements. We currently maintain a broker margin account for Sharp included within other current assets on the consolidated balance sheets which had a balance of $1.9 million and $2.1 million as of September 30, 2024 and December 31, 2023, respectively. Financial Statements Presentation The following tables present information about the fair value and related gains and losses of our derivative contracts. We did not have any derivative contracts with a credit-risk related contingency. Fair values of the derivative contracts recorded in the condensed consolidated balance sheets as of September 30, 2024 and December 31, 2023, are as follows: Derivative Assets Fair Value As Of (in thousands) Balance Sheet Location September 30, 2024 December 31, 2023 Derivatives designated as cash flow hedges Propane swap agreements Derivative assets, at fair value $ 334 $ 702 Interest rate swap agreements Derivative assets, at fair value 193 365 Total Derivative Assets (1) $ 527 $ 1,067 (1) Derivative assets, at fair value, include $0.4 million in current assets in the condensed consolidated balance sheet at September 30, 2024 and $1.0 million at December 31, 2023, with the remainder of the balances classified as long-term. Derivative Liabilities Fair Value As Of (in thousands) Balance Sheet Location September 30, 2024 December 31, 2023 Derivatives designated as cash flow hedges Propane swap agreements Derivative liabilities, at fair value $ 254 $ 1,078 Interest rate swap agreements Derivative liabilities, at fair value 2,409 203 Total Derivative Liabilities (1) $ 2,663 $ 1,281 (1) Derivative liabilities, at fair value, include $0.6 million in current liabilities in the condensed consolidated balance sheet at September 30, 2024 and $0.4 million at December 31, 2023, with the remainder of the balances classified as long-term. The effects of gains and losses from derivative instruments on the condensed consolidated statements of income are as follows: Amount of Gain (Loss) on Derivatives Location of Gain For the Three Months Ended September 30, For the Nine Months Ended September 30, (in thousands) (Loss) on Derivatives 2024 2023 2024 2023 Derivatives designated as cash flow hedges Propane swap agreements Revenues $ — $ — $ (307) $ 733 Propane swap agreements Unregulated propane and natural gas costs (87) (452) 1,263 (1,011) Interest rate swap agreements Interest expense 237 160 579 352 Total $ 150 $ (292) $ 1,535 $ 74

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation methods used to measure fair value. The three levels of the fair value hierarchy are the following: Fair Value Hierarchy Description of Fair Value Level Fair Value Technique Utilized Level 1 Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Investments - equity securities - The fair values of these trading securities are recorded at fair value based on unadjusted quoted prices in active markets for identical securities. Investments - mutual funds and other - The fair values of these investments, comprised of money market and mutual funds, are recorded at fair value based on quoted net asset values of the shares. Level 2 Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. Derivative assets and liabilities - The fair value of the propane put/call options, propane and interest rate swap agreements are measured using market transactions for similar assets and liabilities in either the listed or over-the-counter markets. Level 3 Prices or valuation techniques requiring inputs that are both significant to the fair value measurement and unobservable (i.e. supported by little or no market activity). Investments - guaranteed income fund - The fair values of these investments are recorded at the contract value, which approximates their fair value. Financial Assets and Liabilities Measured at Fair Value The following tables summarize our financial assets and liabilities that are measured at fair value on a recurring basis and the fair value measurements, by level, within the fair value hierarchy as of September 30, 2024 and December 31, 2023: Fair Value Measurements Using: As of September 30, 2024 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 23 $ 23 $ — $ — Investments—guaranteed income fund 1,116 — — 1,116 Investments—mutual funds and other 13,016 13,016 — — Total investments 14,155 13,039 — 1,116 Derivative assets 527 — 527 — Total assets $ 14,682 $ 13,039 $ 527 $ 1,116 Liabilities: Derivative liabilities $ 2,663 $ — $ 2,663 $ — Fair Value Measurements Using: As of December 31, 2023 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 21 $ 21 $ — $ — Investments—guaranteed income fund 1,489 — — 1,489 Investments—mutual funds and other 10,772 10,772 — — Total investments 12,282 10,793 — 1,489 Derivative assets 1,067 — 1,067 — Total assets $ 13,349 $ 10,793 $ 1,067 $ 1,489 Liabilities: Derivative liabilities $ 1,281 $ — $ 1,281 $ — The changes in the fair value of Level 3 investments for the nine months ended September 30, 2024 and 2023 were not material. Investment income from the Level 3 investments is reflected in other income, net in the condensed consolidated statements of income. At September 30, 2024, there were no non-financial assets or liabilities required to be reported at fair value. We review our non-financial assets for impairment at least on an annual basis, as required. Other Financial Assets and Liabilities Financial assets with carrying values approximating fair value include cash and cash equivalents and accounts receivable. Financial liabilities with carrying values approximating fair value include accounts payable and other accrued liabilities and short-term debt. The fair value of cash and cash equivalents is measured using the comparable value in the active market and approximates its carrying value (Level 1 measurement). The fair value of short-term debt approximates the carrying value due to its near-term maturities and because interest rates approximate current market rates (Level 2 measurement). At September 30, 2024, long-term debt, which includes current maturities but excludes debt issuance costs, had both a carrying value and estimated fair value of approximately $1.2 billion. At December 31, 2023, long-term debt, which includes the current maturities but excludes debt issuance costs, had both a carrying value and estimated fair value of approximately $1.2 billion. The fair value was calculated using a discounted cash flow methodology that incorporates a market interest rate based on published corporate borrowing rates for debt instruments with similar terms and average maturities, and with adjustments for duration, optionality, and risk profile. The valuation technique used to estimate the fair value of long-term debt would be considered a Level 2 measurement.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Our outstanding long-term debt is shown below: September 30, December 31, (in thousands) 2024 2023 Uncollateralized senior notes: 5.68% notes, due June 2026 $ 5,800 $ 8,700 6.39% notes, due December 2026 100,000 100,000 6.44% notes, due December 2027 100,000 100,000 6.43% notes, due May 2028 2,800 3,500 3.73% notes, due December 2028 10,000 10,000 6.45% notes, due December 2028 100,000 100,000 3.88% notes, due May 2029 25,000 30,000 6.62% notes, due December 2030 100,000 100,000 3.25% notes, due April 2032 54,250 59,500 6.71% notes, due December 2033 100,000 100,000 2.98% notes, due December 2034 70,000 70,000 3.00% notes, due July 2035 50,000 50,000 2.96% notes, due August 2035 40,000 40,000 2.49% notes, due January 2037 50,000 50,000 5.43% notes, due March 2038 80,000 80,000 3.48% notes, due May 2038 50,000 50,000 3.58% notes, due November 2038 50,000 50,000 6.73% notes, due December 2038 50,000 50,000 3.98% notes, due August 2039 100,000 100,000 2.95% notes, due March 2042 50,000 50,000 Equipment security note 2.46% note, due September 2031 6,957 7,633 Less: debt issuance costs (3,329) (3,753) Total long-term debt 1,191,478 1,205,580 Less: current maturities (18,522) (18,505) Total long-term debt, net of current maturities $ 1,172,956 $ 1,187,075 Terms of the Senior Notes All of our outstanding Senior Notes set forth certain business covenants to which we are subject when any note is outstanding, including covenants that limit or restrict our ability, and the ability of our subsidiaries, to incur indebtedness, or place or permit liens and encumbrances on any of our property or the property of our subsidiaries. Senior Notes On November 1, 2024, we issued 5.20 percent Senior Notes due in October 2029 in the aggregate principal amount of $100.0 million. The proceeds received were used to reduce short-term borrowings under our Revolver and to fund capital expenditures. These Senior Notes have similar covenants and default provisions as our other Senior Notes, and have semi-annual principal payments due on May 1 and November 1 of each year beginning in 2025. On November 20, 2023, we issued Senior Notes in the aggregate principal amount of $550.0 million at an average interest rate of 6.54 percent that were used to partially finance our acquisition of FCG which closed during the fourth quarter of 2023. These notes have varying final maturity dates of between three and 15 years, and the outstanding principal balance of the notes (net of annual payments on the 6.73 percent notes which begin in 2029) will be due on their respective maturity dates with interest payments payable semiannually until the principal has been paid in full. These Senior Notes have similar covenants and default provisions as our other Senior Notes. On March 14, 2023 we issued 5.43 percent Senior Notes due in March 2038 in the aggregate principal amount of $80.0 million and used the proceeds received from the issuances of the Senior Notes to reduce short-term borrowings under our Revolver and to fund capital expenditures. These Senior Notes have similar covenants and default provisions as our other Senior Notes, and have an annual principal payment beginning in the sixth year after the issuance. Shelf Agreements We have entered into Shelf Agreements with Prudential and MetLife with terms that extend through February 2026, however neither of such lenders have any obligation to purchase debt thereunder. At September 30, 2024, a total of $255.0 million of borrowing capacity was available under these agreements.

Leases Leases

Leases Leases	9 Months Ended
	Sep. 30, 2024
Lease Disclosure [Abstract]
Lessee, Operating Leases [Text Block]	Leases We have entered into lease arrangements for office space, land, equipment, pipeline facilities and warehouses. These lease arrangements enable us to better conduct business operations in the regions in which we operate. Office space is leased to provide adequate workspace for our employees in several locations throughout our service territories. We lease land at various locations throughout our service territories to enable us to inject natural gas into underground storage and distribution systems, for bulk storage capacity, for our propane operations and for storage of equipment used in repairs and maintenance of our infrastructure. We lease natural gas compressors to ensure timely and reliable transportation of natural gas to our customers. We also lease warehouses to store equipment and materials used in repairs and maintenance for our businesses. Some of our leases are subject to annual changes in the Consumer Price Index (“CPI”). While lease liabilities are not re-measured as a result of changes to the CPI, changes to the CPI are treated as variable lease payments and recognized in the period in which the obligation for those payments was incurred. A 100-basis-point increase in CPI would not have resulted in material additional annual lease costs. Most of our leases include options to renew, with renewal terms that can extend the lease term from one to 25 years or more. The exercise of lease renewal options is at our sole discretion. The amounts disclosed in our consolidated balance sheet at September 30, 2024, pertaining to the right-of-use assets and lease liabilities, are measured based on our current expectations of exercising our available renewal options. Our existing leases are not subject to any restrictions or covenants that would preclude our ability to pay dividends, obtain financing or enter into additional leases. As of September 30, 2024, we have not entered into any leases, which have not yet commenced, that would entitle us to significant rights or create additional obligations. The following table presents information related to our total lease cost included in our condensed consolidated statements of income: Three Months Ended Nine Months Ended September 30, September 30, (in thousands) Classification 2024 2023 2024 2023 Operating lease cost (1) Operations expense $ 744 $ 750 $ 2,218 $ 2,318 (1) Includes short-term leases and variable lease costs, which are not material. The following table presents the balance and classifications of our right of use assets and lease liabilities included in our condensed consolidated balance sheets at September 30, 2024 and December 31, 2023: (in thousands) Balance sheet classification September 30, 2024 December 31, 2023 Assets Operating lease assets Operating lease right-of-use assets $ 10,945 $ 12,426 Liabilities Current Operating lease liabilities Other accrued liabilities $ 2,397 $ 2,454 Noncurrent Operating lease liabilities Operating lease - liabilities 9,157 10,550 Total lease liabilities $ 11,554 $ 13,004 The following table presents our weighted-average remaining lease terms and weighted-average discount rates for our operating leases at September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Weighted-average remaining lease term ( in years ) Operating leases 7.8 8.1 Weighted-average discount rate Operating leases 3.5 % 3.5 % The following table presents additional information related to cash paid for amounts included in the measurement of lease liabilities included in our condensed consolidated statements of cash flows as of September 30, 2024 and 2023: Nine Months Ended September 30, (in thousands) 2024 2023 Operating cash flows from operating leases $ 2,204 $ 2,196 The following table presents the future undiscounted maturities of our operating and financing leases at September 30, 2024 and for each of the next five years and thereafter: (in thousands) Operating Leases (1) Remainder of 2024 $ 725 2025 2,442 2026 1,863 2027 1,613 2028 1,236 2029 1,147 Thereafter 4,096 Total lease payments 13,122 Less: Interest (1,568) Present value of lease liabilities $ 11,554 (1) Operating lease payments include $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation References in this document to the “Company,” “Chesapeake Utilities,” “we,” “us” and “our” are intended to mean Chesapeake Utilities Corporation, its divisions and/or its subsidiaries, as appropriate in the context of the disclosure. The accompanying unaudited condensed consolidated financial statements have been prepared in compliance with the rules and regulations of the SEC and GAAP. In accordance with these rules and regulations, certain information and disclosures normally required for audited financial statements have been condensed or omitted. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto, included in our latest Annual Report on Form 10-K for the year ended December 31, 2023. In the opinion of management, these financial statements reflect all adjustments that are necessary for a fair presentation of our results of operations, financial position and cash flows for the interim periods presented. Where necessary to improve comparability, prior period amounts have been reclassified to conform to current period presentation. Due to the seasonality of our business, results for interim periods are not necessarily indicative of results for the entire fiscal year. Revenue and earnings are typically greater during the first and fourth quarters, when consumption of energy is highest due to colder temperatures.
FASB Statements and Other Authoritative Pronouncements

Calculation of Earnings Per S_2

Calculation of Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands, except per share data) Calculation of Basic Earnings Per Share: Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 Weighted average shares outstanding (1) 22,501 17,797 22,346 17,784 Basic Earnings Per Share $ 0.78 $ 0.53 $ 3.67 $ 3.48 Calculation of Diluted Earnings Per Share: Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 Reconciliation of Denominator: Weighted shares outstanding—Basic (1) 22,501 17,797 22,346 17,784 Effect of dilutive securities—Share-based compensation 63 61 56 63 Adjusted denominator—Diluted 22,564 17,858 22,402 17,847 Diluted Earnings Per Share $ 0.78 $ 0.53 $ 3.66 $ 3.47

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following tables display our revenue by major source based on product and service type for the three and nine months ended September 30, 2024 and 2023: Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 9,479 $ — $ — $ 9,479 $ 9,793 $ — $ — $ 9,793 Florida natural gas distribution 36,941 — — 36,941 38,323 — — 38,323 Florida City Gas 33,449 — — 33,449 — — — — FPU electric distribution 29,856 — — 29,856 32,683 — — 32,683 Maryland natural gas division 3,343 — — 3,343 3,447 — — 3,447 Sandpiper natural gas/propane operations 3,925 — — 3,925 3,748 — — 3,748 Elkton Gas 1,024 — — 1,024 1,011 — — 1,011 Total energy distribution 118,017 — — 118,017 89,005 — — 89,005 Energy transmission Aspire Energy — 4,576 — 4,576 — 4,798 — 4,798 Aspire Energy Express 373 — — 373 373 — — 373 Eastern Shore 19,538 — — 19,538 19,228 — — 19,228 Peninsula Pipeline 9,005 — — 9,005 7,904 — — 7,904 Total energy transmission 28,916 4,576 — 33,492 27,505 4,798 — 32,303 Energy generation Eight Flags — 4,242 — 4,242 — 4,437 — 4,437 Propane operations Propane delivery operations — 22,929 — 22,929 — 23,197 — 23,197 CNG / RNG Services Marlin Gas Services — 3,832 — 3,832 — 2,595 — 2,595 Other RNG — 51 — 51 — — — — Total CNG / RNG Services — 3,883 — 3,883 — 2,595 — 2,595 Other and eliminations Eliminations (16,300) (63) (6,107) (22,470) (14,099) (57) (5,879) (20,035) Other — 45 45 — — 45 45 Total other and eliminations (16,300) (63) (6,062) (22,425) (14,099) (57) (5,834) (19,990) Total operating revenues (1) $ 130,633 $ 35,567 $ (6,062) $ 160,138 $ 102,411 $ 34,970 $ (5,834) $ 131,547 (1) Total operating revenues for the three months ended September 30, 2024 include other revenue (revenues from sources other than contracts with customers) of $0.2 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, and $0.1 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, for the three months ended September 30, 2023. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for the Maryland division and Sandpiper Energy and late fees. Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 54,800 $ — $ — $ 54,800 $ 60,809 $ — $ — $ 60,809 Florida natural gas distribution 124,814 — — 124,814 125,446 — — 125,446 Florida City Gas 101,820 — — 101,820 — — — — FPU electric distribution 72,366 — — 72,366 78,455 — — 78,455 Maryland natural gas division 17,879 — — 17,879 20,331 — — 20,331 Sandpiper natural gas/propane operations 14,880 — — 14,880 14,909 — — 14,909 Elkton Gas 5,191 — — 5,191 6,454 — — 6,454 Total energy distribution 391,750 — — 391,750 306,404 — — 306,404 Energy transmission Aspire Energy — 23,515 — 23,515 — 24,478 — 24,478 Aspire Energy Express 1,110 — — 1,110 1,106 — — 1,106 Eastern Shore 60,664 — — 60,664 59,530 — — 59,530 Peninsula Pipeline 25,066 — — 25,066 22,408 — — 22,408 Total energy transmission 86,840 23,515 — 110,355 83,044 24,478 — 107,522 Energy generation Eight Flags — 13,261 — 13,261 — 14,269 — 14,269 Propane operations Propane delivery operations — 112,541 — 112,541 — 110,492 — 110,492 CNG / RNG Services Marlin Gas Services — 10,907 — 10,907 — 9,834 — 9,834 Other RNG — 51 — 51 — — — — Total CNG / RNG Services — 10,958 — 10,958 — 9,834 — 9,834 Other and eliminations Eliminations (48,906) (186) (17,755) (66,847) (43,626) (187) (19,575) (63,388) Other — — 136 136 — — 136 136 Total other and eliminations (48,906) (186) (17,619) (66,711) (43,626) (187) (19,439) (63,252) Total operating revenues (1) $ 429,684 $ 160,089 $ (17,619) $ 572,154 $ 345,822 $ 158,886 $ (19,439) $ 485,269 (1) Total operating revenues for the nine months ended September 30, 2024 include other revenue (revenues from sources other than contracts with customers) of $0.9 million and $0.3 million for our Regulated and Unregulated Energy segments, respectively, and $0.9 million and $0.3 million for our Regulated and Unregulated Energy segments, respectively, for the nine months ended September 30, 2023. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for the Maryland division and Sandpiper Energy and late fees.
Contract with Customer, Asset and Liability [Table Text Block]	The balances of our trade receivables, contract assets, and contract liabilities as of September 30, 2024 and December 31, 2023 were as follows: Trade Receivables Contract Assets (Current) Contract Assets (Non-current) Contract Liabilities (Current) (in thousands) Balance at 12/31/2023 $ 67,741 $ 18 $ 3,524 $ 1,022 Balance at 9/30/2024 47,744 18 3,133 1,243 Increase (Decrease) $ (19,997) $ — $ (391) $ 221
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	Revenue for these businesses for the remaining performance obligations, at September 30, 2024, are expected to be recognized as follows: (in thousands) 2024 2025 2026 2027 2028 2029 2030 and thereafter Eastern Shore and Peninsula Pipeline $ 9,154 $ 33,144 $ 29,072 $ 25,578 $ 23,499 $ 21,294 $ 125,881 Natural gas distribution operations 2,679 10,549 10,073 8,602 8,598 8,555 26,406 FPU electric distribution 187 749 364 364 364 — — Total revenue contracts with remaining performance obligations $ 12,020 $ 44,442 $ 39,509 $ 34,544 $ 32,461 $ 29,849 $ 152,287

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment	The following tables present financial information about our reportable segments: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands) Operating Revenues, Unaffiliated Customers Regulated Energy $ 130,157 $ 101,911 $ 425,084 $ 344,190 Unregulated Energy 29,981 29,636 147,070 141,079 Total operating revenues, unaffiliated customers $ 160,138 $ 131,547 $ 572,154 $ 485,269 Intersegment Revenues (1) Regulated Energy $ 476 $ 500 $ 4,600 $ 1,632 Unregulated Energy 5,586 5,333 13,019 17,807 Other businesses 45 45 136 136 Total intersegment revenues $ 6,107 $ 5,878 $ 17,755 $ 19,575 Operating Income (Loss) Regulated Energy $ 43,935 $ 24,912 $ 142,549 $ 91,828 Unregulated Energy (3,061) (4,723) 18,606 11,529 Other businesses and eliminations 44 39 138 131 Operating income 40,918 20,228 161,293 103,488 Other income (expense), net 400 (72) 1,705 1,036 Interest charges 17,022 7,076 50,861 21,272 Income Before Income Taxes 24,296 13,080 112,137 83,252 Income taxes 6,789 3,673 30,191 21,368 Net Income $ 17,507 $ 9,407 $ 81,946 $ 61,884 (1) All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues. (in thousands) September 30, 2024 December 31, 2023 Identifiable Assets Regulated Energy segment $ 2,967,280 $ 2,781,581 Unregulated Energy segment 448,024 477,402 Other businesses and eliminations 51,888 45,721 Total Identifiable Assets $ 3,467,192 $ 3,304,704

Stockholder's Equity - Accumu_2

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss	Defined Benefit Commodity Interest Rate Pension and Contract Swap Postretirement Cash Flow Cash Flow Plan Items Hedges Hedges Total (in thousands) As of December 31, 2023 $ (2,584) $ (274) $ 120 $ (2,738) Other comprehensive income (loss) before reclassifications — 1,031 (1,340) (309) Amounts reclassified from accumulated other comprehensive income (loss) 41 (698) (431) (1,088) Net current-period other comprehensive income (loss) 41 333 (1,771) (1,397) As of September 30, 2024 $ (2,543) $ 59 $ (1,651) $ (4,135) As of December 31, 2022 $ (2,506) $ 1,092 $ 35 $ (1,379) Other comprehensive income (loss) before reclassifications — (660) 928 268 Amounts reclassified from accumulated other comprehensive income (loss) 32 202 (260) (26) Net prior-period other comprehensive income (loss) 32 (458) 668 242 As of September 30, 2023 $ (2,474) $ 634 $ 703 $ (1,137)

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic (benefit) cost for the FPU Pension Plan for the three and nine months ended September 30, 2024 and 2023 is set forth in the following table: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands) Interest cost $ 599 $ 633 $ 1,797 $ 1,899 Expected return on plan assets (724) (668) (2,172) (2,004) Amortization of net loss 69 110 207 330 Total periodic (benefit) cost $ (56) $ 75 $ (168) $ 225

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2024
Shares awarded to non-employee directors [Line Items]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan	The table below presents the amounts included in net income related to share-based compensation expense for the three and nine months ended September 30, 2024 and 2023: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 (in thousands) Awards to key employees $ 1,717 $ 1,724 $ 5,797 $ 4,164 Awards to non-employee directors 220 214 652 693 Total compensation expense 1,937 1,938 6,449 4,857 Less: tax benefit (495) (501) (1,647) (1,255) Share-based compensation amounts included in net income $ 1,442 $ 1,437 $ 4,802 $ 3,602
Award to key employees [Member]
Shares awarded to non-employee directors [Line Items]
Schedule of Share-based Compensation, Activity	The table below presents the summary of the stock activity for awards to key employees for the nine months ended September 30, 2024: (in thousands, except per share data) Number of Shares Weighted Average Outstanding—December 31, 2023 213 $ 117.74 Granted 110 $ 105.21 Vested (43) $ 103.95 Expired (27) $ 86.24 Outstanding—September 30, 2024 253 $ 117.96

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments [Table Text Block]	As of September 30, 2024, the volume of our commodity derivative contracts were as follows: Business unit Commodity Contract Type Quantity hedged (in millions) Designation Longest Expiration date of hedge Sharp Propane (gallons) Purchases 13.1 Cash flow hedges March 2027
Fair Values of Derivative Contracts Recorded in Condensed Consolidated Balance Sheet	September 30, 2024 and December 31, 2023, are as follows: Derivative Assets Fair Value As Of (in thousands) Balance Sheet Location September 30, 2024 December 31, 2023 Derivatives designated as cash flow hedges Propane swap agreements Derivative assets, at fair value $ 334 $ 702 Interest rate swap agreements Derivative assets, at fair value 193 365 Total Derivative Assets (1) $ 527 $ 1,067 (1) Derivative assets, at fair value, include $0.4 million in current assets in the condensed consolidated balance sheet at September 30, 2024 and $1.0 million at December 31, 2023, with the remainder of the balances classified as long-term. Derivative Liabilities Fair Value As Of (in thousands) Balance Sheet Location September 30, 2024 December 31, 2023 Derivatives designated as cash flow hedges Propane swap agreements Derivative liabilities, at fair value $ 254 $ 1,078 Interest rate swap agreements Derivative liabilities, at fair value 2,409 203 Total Derivative Liabilities (1) $ 2,663 $ 1,281 (1) Derivative liabilities, at fair value, include $0.6 million in current liabilities in the condensed consolidated balance sheet at September 30, 2024 and $0.4 million at December 31, 2023, with the remainder of the balances classified as long-term.
Effects of Gains and Losses from Derivative Instruments on Condensed Consolidated Financial Statements	The effects of gains and losses from derivative instruments on the condensed consolidated statements of income are as follows: Amount of Gain (Loss) on Derivatives Location of Gain For the Three Months Ended September 30, For the Nine Months Ended September 30, (in thousands) (Loss) on Derivatives 2024 2023 2024 2023 Derivatives designated as cash flow hedges Propane swap agreements Revenues $ — $ — $ (307) $ 733 Propane swap agreements Unregulated propane and natural gas costs (87) (452) 1,263 (1,011) Interest rate swap agreements Interest expense 237 160 579 352 Total $ 150 $ (292) $ 1,535 $ 74

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables summarize our financial assets and liabilities that are measured at fair value on a recurring basis and the fair value measurements, by level, within the fair value hierarchy as of September 30, 2024 and December 31, 2023: Fair Value Measurements Using: As of September 30, 2024 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 23 $ 23 $ — $ — Investments—guaranteed income fund 1,116 — — 1,116 Investments—mutual funds and other 13,016 13,016 — — Total investments 14,155 13,039 — 1,116 Derivative assets 527 — 527 — Total assets $ 14,682 $ 13,039 $ 527 $ 1,116 Liabilities: Derivative liabilities $ 2,663 $ — $ 2,663 $ — Fair Value Measurements Using: As of December 31, 2023 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 21 $ 21 $ — $ — Investments—guaranteed income fund 1,489 — — 1,489 Investments—mutual funds and other 10,772 10,772 — — Total investments 12,282 10,793 — 1,489 Derivative assets 1,067 — 1,067 — Total assets $ 13,349 $ 10,793 $ 1,067 $ 1,489 Liabilities: Derivative liabilities $ 1,281 $ — $ 1,281 $ —
Summary of Changes in Fair Value of Investments	The changes in the fair value of Level 3 investments for the nine months ended September 30, 2024 and 2023 were not material.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Outstanding Long-Term Debt	Our outstanding long-term debt is shown below: September 30, December 31, (in thousands) 2024 2023 Uncollateralized senior notes: 5.68% notes, due June 2026 $ 5,800 $ 8,700 6.39% notes, due December 2026 100,000 100,000 6.44% notes, due December 2027 100,000 100,000 6.43% notes, due May 2028 2,800 3,500 3.73% notes, due December 2028 10,000 10,000 6.45% notes, due December 2028 100,000 100,000 3.88% notes, due May 2029 25,000 30,000 6.62% notes, due December 2030 100,000 100,000 3.25% notes, due April 2032 54,250 59,500 6.71% notes, due December 2033 100,000 100,000 2.98% notes, due December 2034 70,000 70,000 3.00% notes, due July 2035 50,000 50,000 2.96% notes, due August 2035 40,000 40,000 2.49% notes, due January 2037 50,000 50,000 5.43% notes, due March 2038 80,000 80,000 3.48% notes, due May 2038 50,000 50,000 3.58% notes, due November 2038 50,000 50,000 6.73% notes, due December 2038 50,000 50,000 3.98% notes, due August 2039 100,000 100,000 2.95% notes, due March 2042 50,000 50,000 Equipment security note 2.46% note, due September 2031 6,957 7,633 Less: debt issuance costs (3,329) (3,753) Total long-term debt 1,191,478 1,205,580 Less: current maturities (18,522) (18,505) Total long-term debt, net of current maturities $ 1,172,956 $ 1,187,075

Leases Leases (Tables)

Leases Leases (Tables)	9 Months Ended
	Sep. 30, 2024
Lease Disclosure [Abstract]
Lease, Cost [Table Text Block]	Three Months Ended Nine Months Ended September 30, September 30, (in thousands) Classification 2024 2023 2024 2023 Operating lease cost (1) Operations expense $ 744 $ 750 $ 2,218 $ 2,318 (1)
Schedule of Leases Reported on Consolidated Statement of Financial Position [Table Text Block]	The following table presents the balance and classifications of our right of use assets and lease liabilities included in our condensed consolidated balance sheets at September 30, 2024 and December 31, 2023: (in thousands) Balance sheet classification September 30, 2024 December 31, 2023 Assets Operating lease assets Operating lease right-of-use assets $ 10,945 $ 12,426 Liabilities Current Operating lease liabilities Other accrued liabilities $ 2,397 $ 2,454 Noncurrent Operating lease liabilities Operating lease - liabilities 9,157 10,550 Total lease liabilities $ 11,554 $ 13,004
Leases, Weighted Average Remaining Lease Term [Table Text Block]	The following table presents our weighted-average remaining lease terms and weighted-average discount rates for our operating leases at September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Weighted-average remaining lease term ( in years ) Operating leases 7.8 8.1 Weighted-average discount rate Operating leases 3.5 % 3.5 %
Lease, Cash Flow [Table Text Block]	The following table presents additional information related to cash paid for amounts included in the measurement of lease liabilities included in our condensed consolidated statements of cash flows as of September 30, 2024 and 2023: Nine Months Ended September 30, (in thousands) 2024 2023 Operating cash flows from operating leases $ 2,204 $ 2,196
Schedule of Maturities of Leases [Table Text Block]	The following table presents the future undiscounted maturities of our operating and financing leases at September 30, 2024 and for each of the next five years and thereafter: (in thousands) Operating Leases (1) Remainder of 2024 $ 725 2025 2,442 2026 1,863 2027 1,613 2028 1,236 2029 1,147 Thereafter 4,096 Total lease payments 13,122 Less: Interest (1,568) Present value of lease liabilities $ 11,554 (1) Operating lease payments include $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.

Calculation of Earnings Per S_3

Calculation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.78	$ 0.53	$ 3.67	$ 3.48
Calculation of Basic Earnings Per Share:
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
Weighted shares outstanding (shares)	[1]	22,501,000	17,797,000	22,346,000	17,784,000
Basic Earnings Per Share (in dollars per share)		$ 0.78	$ 0.53	$ 3.67	$ 3.48
Reconciliation of Numerator:
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
Reconciliation of Denominator:
Weighted shares outstanding - Basic (shares)	[1]	22,501,000	17,797,000	22,346,000	17,784,000
Effect of dilutive securities:
Share-based compensation (shares)		63,000	61,000	56,000	63,000
Adjusted denominator-Diluted (shares)		22,564,000	17,858,000	22,402,000	17,847,000
Income (Loss) from Continuing Operations, Per Diluted Share		$ 0.78	$ 0.53	$ 3.66	$ 3.47
Diluted Earnings Per Share (in dollars per share)		$ 0.78	$ 0.53	$ 3.66	$ 3.47
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
Basic (shares)	[1]	22,501,000	17,797,000	22,346,000	17,784,000
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.78	$ 0.53	$ 3.67	$ 3.48
Basic (in dollars per share)		$ 0.78	$ 0.53	$ 3.67	$ 3.48
Share-based compensation (shares)		63,000	61,000	56,000	63,000
Diluted (shares)		22,564,000	17,858,000	22,402,000	17,847,000
Income (Loss) from Continuing Operations, Per Diluted Share		$ 0.78	$ 0.53	$ 3.66	$ 3.47
Diluted (in dollars per share)		$ 0.78	$ 0.53	$ 3.66	$ 3.47
Proceeds from Issuance of Senior Long-Term Debt				$ 550,000
Retained Earnings [Member]
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		$ 17,507	$ 9,407	81,946	$ 61,884
Calculation of Basic Earnings Per Share:
Net Income		17,507	9,407	81,946	61,884
Reconciliation of Numerator:
Net Income		17,507	9,407	81,946	61,884
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		17,507	9,407	81,946	61,884
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
[1] (1) Weighted average shares for the three and nine months ended September 30, 2024 reflect the impact of 4.4 million common shares issued in November 2023 in connection with the acquisition of FCG. See Notes 3 and 9 for additional details on the acquisition and related equity offering.

Acquisitions and Divestitures_2

Acquisitions and Divestitures (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Acquisitions - Additional Information [Line Items]
Revenues	$ 160,138,000	$ 131,547,000	$ 572,154,000	$ 485,269,000
Operating Income (Loss)	40,918,000	20,228,000	$ 161,293,000	$ 103,488,000
Number of Miles of Distribution Mains			150	160
Transaction-related expenses	819,000	3,899,000	$ 3,114,000	$ 3,899,000
Total operating income	40,918,000	20,228,000	161,293,000	103,488,000
Business Combination, Acquisition Related Costs				15,900,000
Transaction-related expenses						$ 4,100,000
Proceeds from Issuance of Senior Long-Term Debt			550,000,000
Equity Issued in Business Combination, Fair Value Disclosure					$ 366,400,000
Unregulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Operating Income (Loss)	(3,061,000)	(4,723,000)	18,606,000	11,529,000
Total operating income	(3,061,000)	(4,723,000)	18,606,000	11,529,000
Regulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Operating Income (Loss)	43,935,000	24,912,000	142,549,000	91,828,000
Total operating income	43,935,000	$ 24,912,000	142,549,000	91,828,000
J.T. Lee and Son's
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,700,000		$ 2,700,000
Number of customers acquired through acquisition			3,000
Business Combination, Consideration Transferred			$ 3,900,000
Business Combination, Working Capital	200,000		200,000
Business Combination, Contingent Consideration, Liability	300,000		300,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	900,000		900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	100,000		$ 100,000
Gallons acquired through acquisition			800,000
Acquisitions - Additional Information [Line Items]
Number of customers acquired through acquisition			3,000
Business Combination, Consideration Transferred			$ 3,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,700,000		2,700,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	900,000		900,000
Business Combination, Contingent Consideration, Liability	300,000		$ 300,000
Gallons acquired through acquisition			800,000
Business Combination, Working Capital	200,000		$ 200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	100,000		$ 100,000
Bulk Plant Storage Acquired Through Acquisition			60,000
Florida City Gas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						454,410,000
Number of customers acquired through acquisition			120,000
Business Combination, Consideration Transferred			$ 922,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						14,138,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						35,619,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						460,875,000
Acquisitions - Additional Information [Line Items]
Number of customers acquired through acquisition			120,000
Business Combination, Consideration Transferred			$ 922,800,000
Number of Miles of Distribution Mains			3,800
Number of Miles of Transmission Pipe			80
Transaction-related expenses	800,000		$ 3,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents						2,261,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						14,138,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory assets - current						2,983,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other						2,082,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						454,410,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						460,875,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Regulatory assets - noncurrent						3,381,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets						18,309,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						958,439,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						(20,934,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory liabilities - noncurrent						(14,137,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other						(548,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						35,619,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						$ 922,820,000
Business Combination, Integration Related Costs				$ 10,400,000
Florida City Gas | Regulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Revenues	33,400,000		101,800,000
Operating Income (Loss)	3,900,000		9,900,000
Bridge Loan	965,000,000		965,000,000
Total operating income	$ 3,900,000		$ 9,900,000

Revenue Recognition Disegragati

Revenue Recognition Disegragation of Revenue (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2024		Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 160,138,000		$ 131,547,000		$ 572,154,000		$ 485,269,000
Revenue from Contract with Customer, Excluding Assessed Tax	160,138,000	[1]	131,547,000	[1]	572,154,000	[2]	485,269,000	[2]
Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	130,633,000	[1]	102,411,000	[1]	429,684,000	[2]	345,822,000	[2]
Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35,567,000	[1]	34,970,000	[1]	160,089,000	[2]	158,886,000	[2]
Other Segments And Intersegments Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,062,000)		(5,834,000)		(17,619,000)		(19,439,000)
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,062,000)	[1]	(5,834,000)	[1]	(17,619,000)	[2]	(19,439,000)	[2]
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(22,425,000)		(19,990,000)		(66,711,000)		(63,252,000)
Eliminations [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(16,300,000)		(14,099,000)		(48,906,000)		(43,626,000)
Other [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues	200,000		100,000		900,000		900,000
Other [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues	100,000		100,000		300,000		300,000
Revenue from Contract with Customer, Excluding Assessed Tax	(63,000)		(57,000)		(186,000)		(187,000)
Energy Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	118,017,000		89,005,000		391,750,000		306,404,000
Energy Distribution [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	118,017,000		89,005,000		391,750,000		306,404,000
Energy Distribution [Member] | Delaware natural gas division [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,479,000		9,793,000		54,800,000		60,809,000
Energy Distribution [Member] | Delaware natural gas division [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,479,000		9,793,000		54,800,000		60,809,000
Energy Distribution [Member] | FPU Electric Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	29,856,000		32,683,000		72,366,000		78,455,000
Energy Distribution [Member] | FPU Electric Distribution [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	29,856,000		32,683,000		72,366,000		78,455,000
Energy Distribution [Member] | Florida Public Utilities Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36,941,000		38,323,000		124,814,000		125,446,000
Energy Distribution [Member] | Florida Public Utilities Company [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36,941,000		38,323,000		124,814,000		125,446,000
Energy Distribution [Member] | Maryland Natural Gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,343,000		3,447,000		17,879,000		20,331,000
Energy Distribution [Member] | Maryland Natural Gas [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,343,000		3,447,000		17,879,000		20,331,000
Energy Distribution [Member] | Sandpiper [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,925,000		3,748,000		14,880,000		14,909,000
Energy Distribution [Member] | Sandpiper [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,925,000		3,748,000		14,880,000		14,909,000
Energy Distribution [Member] | Elkton Gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,024,000				5,191,000
Energy Distribution [Member] | Elkton Gas [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,024,000		1,011,000		5,191,000		6,454,000
Energy Distribution [Member] | Florida City Gas | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	33,449,000		0		101,820,000		0
Energy Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	33,492,000		32,303,000		110,355,000		107,522,000
Energy Transmission [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	28,916,000		27,505,000		86,840,000		83,044,000
Energy Transmission [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,576,000		4,798,000		23,515,000		24,478,000
Energy Transmission [Member] | Aspire [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,576,000		4,798,000		23,515,000		24,478,000
Energy Transmission [Member] | Aspire [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,576,000		4,798,000		23,515,000		24,478,000
Energy Transmission [Member] | Eastern Shore Gas Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19,538,000		19,228,000		60,664,000		59,530,000
Energy Transmission [Member] | Eastern Shore Gas Company [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19,538,000		19,228,000		60,664,000		59,530,000
Energy Transmission [Member] | Peninsula Pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,005,000		7,904,000		25,066,000		22,408,000
Energy Transmission [Member] | Peninsula Pipeline [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,005,000		7,904,000		25,066,000		22,408,000
Energy Transmission [Member] | Aspire Energy Express | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	373,000		373,000		1,110,000		1,106,000
Energy Generation [Member] | Eight Flags [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,242,000		4,437,000		13,261,000		14,269,000
Energy Generation [Member] | Eight Flags [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,242,000		4,437,000		13,261,000		14,269,000
Propane Delivery [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22,929,000		23,197,000		112,541,000		110,492,000
Propane Delivery [Member] | Florida Propane | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22,929,000		23,197,000		112,541,000		110,492,000
Energy Services [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,883,000		2,595,000		10,958,000		9,834,000
Energy Services [Member] | Marlin Gas Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,832,000				10,907,000
Energy Services [Member] | Marlin Gas Services [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,832,000		2,595,000				9,834,000
Energy Services [Member] | Other RNG | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	51,000				51,000
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(22,470,000)		(20,035,000)		(66,847,000)		(63,388,000)
Eliminations [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(16,300,000)		(14,099,000)		(48,906,000)		(43,626,000)
Eliminations [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(63,000)		(57,000)		(186,000)		(187,000)
Eliminations [Member] | Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,107,000)		(5,879,000)		(17,755,000)		(19,575,000)
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	45,000		45,000		136,000		136,000
Other [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0		0		0
Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 45,000		$ 45,000		$ 136,000		$ 136,000
[1]) Total operating revenues for the three months ended September 30, 2024 include other revenue (revenues from sources other than contracts with customers) of $0.2 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, and $0.1 million and $0.1 million for our Regulated and Unregulated Energy segments, respectively, for the three months ended September 30, 2023. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for the Maryland division and Sandpiper Energy and late fees. (1) Total operating revenues for the nine months ended September 30, 2024

Revenue Recognition Contract Ba

Revenue Recognition Contract Balances with Customers (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Receivable from Customer in Brokerage	$ 47,744	$ 67,741
Contract with Customer, Asset, Net, Current	18	18
Contract with Customer, Asset, Net, Noncurrent	3,133	3,524
Customer deposits and refunds	1,243	$ 1,022
Increase (Decrease) in Receivables	(19,997)
Increase (Decrease) in Other Current Assets	0
Increase (Decrease) in Other Noncurrent Assets	(391)
Increase (Decrease) in Other Current Liabilities	$ 221

Revenue Recognition Remaining P

Revenue Recognition Remaining Performance Obligations (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 187
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	749
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	364
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	364
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	364
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	0
FPU Electric Distribution [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	0
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,679
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	10,549
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	10,073
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	8,602
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	8,598
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	8,555
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	26,406
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	9,154
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	33,144
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	29,072
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	25,578
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	23,499
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	21,294
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	125,881
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	12,020
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	44,442
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	39,509
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	34,544
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	32,461
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	29,849
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 152,287

Rates and Other Regulatory Ac_2

Rates and Other Regulatory Activities - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) Dekatherm	Sep. 30, 2023	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	$ (84,900,000)	$ (84,900,000)				$ 85,800,000
Gas Utility Access and Replacement Directive Related Capital Expenditures		205,000,000
RSAM					$ 25,000,000
Safety, Access, and Facility Enhancement Capital Expenditures		50,000,000
Total Projected Capital Expenditures		255,000,000
Safety, Access, and Facility Enhancement Capital Expenditures		$ 205,000,000
Number of Miles of Distribution Mains		150	160
Environmental liabilities	2,441,000	$ 2,441,000				$ 2,607,000
Depreciation Study Impact	1,200,000	1,200,000
Maryland Natural Gas [Member]
Rates and Other Regulatory Activities [Line Items]
Permanent Rates	$ 6,900,000	6,900,000
Annual Rate Case Recovery		$ 2,600,000
Rate Case ROE	11.50%	11.50%
Florida City Gas
Rates and Other Regulatory Activities [Line Items]
Total Base Rate Increase					23,300,000
Base Rate Increase - liquefied natural gas facility					3,800,000
Base Rate Increase Base - SAFE investments transfer to base rates					5,300,000
Base Rate Increase					14,100,000
RSAM Adjustment	$ 3,200,000	$ (8,900,000)
Florida City Gas | Storm Reserve
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities					800,000
Florida Electric Distribution
Rates and Other Regulatory Activities [Line Items]
Permanent Rates	$ 12,600,000	12,600,000
Annual Rate Case Recovery		$ 1,800,000
Cost Recovery Storm Protection Plan				$ 20,400,000	13,600,000
Rate Case ROE	11.30%	11.30%
West Palm Beach Florida [Member] | Minimum [Member]
Rates and Other Regulatory Activities [Line Items]
Estimated costs of remediation range, minimum		$ 3,000,000
West Palm Beach Florida [Member] | Maximum [Member]
Rates and Other Regulatory Activities [Line Items]
Estimated costs of remediation range, minimum		5,400,000
Delaware natural gas division [Member]
Rates and Other Regulatory Activities [Line Items]
Permanent Rates	$ 12,100,000	12,100,000
Annual Rate Case Recovery		$ 2,500,000
Rate Case ROE	11.50%	11.50%
Florida Public Utilities Company [Member]
Rates and Other Regulatory Activities [Line Items]
Environmental liabilities	$ 3,400,000	$ 3,400,000			$ 3,600,000
Eastern Shore Gas Company [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	$ 34,200,000	$ 34,200,000
Newberry Expansion | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		8,000
East Coast Reinforcement Projects: Boynton Beach | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		15,000
East Coast Reinforcement Projects: New Smyrna Beach | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		3,400
Central Florida Reinforcement Projects | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		8,700
Central Florida Reinforcement Projects: Plant City | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		5,000
St. Cloud Project Amendment | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm		10,000

Environmental Commitments and_2

Environmental Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2024 USD ($) site	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Environmental Commitments And Contingencies [Line Items]
Company's exposure in number of former Manufactured Gas Plant Sites | site	7
Environmental liabilities	$ 2,441,000		$ 2,607,000
West Palm Beach Florida [Member] | Minimum [Member]
Environmental Commitments And Contingencies [Line Items]
Estimated costs of remediation range, minimum	3,000,000
West Palm Beach Florida [Member] | Maximum [Member]
Environmental Commitments And Contingencies [Line Items]
Estimated costs of remediation range, minimum	5,400,000
Seaford [Member] | Minimum [Member]
Environmental Commitments And Contingencies [Line Items]
Estimated costs of remediation range, minimum	300,000
Seaford [Member] | Maximum [Member]
Environmental Commitments And Contingencies [Line Items]
Estimated costs of remediation range, minimum	800,000
Manufactured Gas Plant [Member]
Environmental Commitments And Contingencies [Line Items]
Regulatory Assets for future recovery of environmental costs	300,000		$ 500,000
FPU [Member]
Environmental Commitments And Contingencies [Line Items]
Environmental liabilities	$ 3,400,000	$ 3,600,000

Other Commitments and Conting_2

Other Commitments and Contingencies - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Other Commitments [Line Items]
Debt Service Coverage Ratio	1.25
Debt Service Coverage Ratio Measurement Period	12
Maximum Days To Make Default Good	5 days
Ratios based on average of the prior quarters	1 year 6 months
Number Of Years For Power Purchase Agreement	20 years
Contract Duration	20 years
Aggregate guaranteed amount	$ 35
Guarantor Obligations, Current Carrying Value	27.5
Draws on letters of credit	6.3
Specific Purpose
Other Commitments [Line Items]
Guarantor Obligations, Current Carrying Value	$ 4
Delmarva [Member]
Other Commitments [Line Items]
Number of Years for Asset Management Agreement	3 years

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information by Segment (Detail) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments				2
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers		$ 160,138	$ 131,547	$ 572,154	$ 485,269
Operating Income
Total operating income		40,918	20,228	161,293	103,488
Other expense, net		400	(72)	1,705	1,036
Interest		17,022	7,076	50,861	21,272
Income Before Income Taxes		24,296	13,080	112,137	83,252
Income taxes		6,789	3,673	30,191	21,368
Net Income		17,507	9,407	81,946	61,884
Identifiable Assets
Total identifiable assets		3,467,192		3,467,192		$ 3,304,704
Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers		6,107	5,878	17,755	19,575
Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers		160,138	131,547	572,154	485,269
Regulated Energy [Member]
Operating Income
Total operating income		43,935	24,912	142,549	91,828
Identifiable Assets
Total identifiable assets		2,967,280		2,967,280		2,781,581
Regulated Energy [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	[1]	476	500	4,600	1,632
Regulated Energy [Member] | Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers		130,157	101,911	425,084	344,190
Unregulated Energy [Member]
Operating Income
Total operating income		(3,061)	(4,723)	18,606	11,529
Identifiable Assets
Total identifiable assets		448,024		448,024		477,402
Unregulated Energy [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	[1]	5,586	5,333	13,019	17,807
Unregulated Energy [Member] | Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers		29,981	29,636	147,070	141,079
Other [Member]
Identifiable Assets
Total identifiable assets		51,888		51,888		$ 45,721
Other [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	[1]	45	45	136	136
Other and eliminations [Member]
Operating Income
Total operating income		44	39	138	131
Retained Earnings [Member]
Operating Income
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		17,507	9,407	81,946	61,884
Net Income		$ 17,507	$ 9,407	$ 81,946	$ 61,884
[1] All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues.

Stockholder's Equity - Accumu_3

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2024	Nov. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (2,738)	$ (1,379)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(309)	268
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(1,088)	(26)
Net current-period other comprehensive income (loss)	$ (2,559)	$ 1,922	(1,397)	242
Ending balance	(4,135)	(1,137)	(4,135)	(1,137)
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			56,800
Equity Issued in Business Combination, Fair Value Disclosure					$ 366,400
Proceeds from Issuance of Senior Long-Term Debt			550,000
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			56,800
Maximum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from Stock Plans			75,000
Proceeds from Stock Plans			75,000
UnrealizedGainsLossesFromDefinedBenefitPensionAndPostretirementPlanItems [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(2,584)	(2,506)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			41	32
Net current-period other comprehensive income (loss)			41	32
Ending balance	(2,543)	(2,474)	(2,543)	(2,474)
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(274)	1,092
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(609)	1,385	1,031	(660)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	63	328	(698)	202
Net current-period other comprehensive income (loss)			333	(458)
Ending balance	59	634	59	634
Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			120	35
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(1,851)	316	(1,340)	928
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(431)	(260)
Net current-period other comprehensive income (loss)			(1,771)	668
Ending balance	$ (1,651)	$ 703	(1,651)	$ 703
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Issued, Price Per Share						$ 82.72
Proceeds from Issuance of Senior Long-Term Debt			$ 4,400

Stockholder's Equity - Accumu_4

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) - Reclassifications of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Amortization of pension and postretirement items:
Tax benefit	$ (6,789)	$ (3,673)	$ (30,191)	$ (21,368)
Derivative, Gain (Loss) on Derivative, Net	150	(292)	1,535	74
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			56,800
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Interest Expense [Member]
Amortization of pension and postretirement items:
Derivative, Gain (Loss) on Derivative, Net	$ 237	$ 160	$ 579	$ 352

Employee Benefit Plans (Detail)

Employee Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 9,775		$ 9,775		$ 9,050
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	599	$ 633	1,797	$ 1,899
Expected return on plan assets	(724)	(668)	(2,172)	(2,004)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	69	110	207	330
Total periodic cost	(56)	$ 75	(168)	$ 225
Rabbi Trust Associated With Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 14,100		$ 14,100		$ 12,300

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Investments, at fair value	$ 14,156		$ 14,156		$ 12,282
Payment for Other Postretirement Benefits			1,000
Deferred compensation obligation	9,775		9,775		$ 9,050
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ 69	$ 110	$ 207	$ 330

Employee Benefit Plans - Amount

Employee Benefit Plans - Amounts Included in Regulatory Asset and Accumulated Other Comprehensive Income/Loss Recognized as Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ 69	$ 110	$ 207	$ 330

Share-Based Compensation - Shar

Share-Based Compensation - Share-Based Compensation Amounts Included in Net Income (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 1,937	$ 1,938		$ 6,449	$ 4,857
Less: tax benefit	(495)	(501)		(1,647)	(1,255)
Share-Based Compensation amounts included in net income	1,442	1,437		$ 4,802	3,602
Awards to non-employee directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			1,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 110.53
Total compensation expense	$ 220	214		$ 652	693
Award to key employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	253,000		253,000	253,000		213,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				110,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				43,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period				(27,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 117.96		$ 117.96	$ 117.96		$ 117.74
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				105.21
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value				103.95
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expirations Weighted Average Grant Date Fair Value				$ 86.24
Total compensation expense	$ 1,717	$ 1,724		$ 5,797	$ 4,164

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Stock Activity under the SICP (Detail) - $ / shares	5 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Award to key employees [Member]
Number of Shares
Outstanding - December 31, 2020 (shares)		213,000
Granted awards (shares)		110,000
Vested (shares)		(43,000)
Expired (shares)		27,000
Outstanding - June 30, 2021 (shares)	253,000	253,000
Weighted Average Fair Value/Share
Outstanding - December 31, 2020 (in dollars per share)		$ 117.74
Granted (in dollars per share)		105.21
Vested (in dollars per share)		103.95
Expired (in dollars per share)		86.24
Outstanding - June 30, 2021 (in dollars per share)	$ 117.96	117.96
Awards to non-employee directors [Member]
Number of Shares
Granted awards (shares)	1,000
Weighted Average Fair Value/Share
Granted (in dollars per share)		$ 110.53

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	5 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		14,000	20,000
Payment, Tax Withholding, Share-based Payment Arrangement		$ 1,466	$ 2,455
Awards to non-employee directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 110.53
Granted awards (shares)	1,000
Unrecognized compensation expense related to the awards to non-employee directors	$ 500	$ 500
Shares awarded to non-employee directors [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 110.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,000
Award to key employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period		(27,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 105.21
Granted awards (shares)		110,000
Vesting period		3 years
Payment, Tax Withholding, Share-based Payment Arrangement		$ 1,500
Intrinsic value of the SICP awards	$ 31,500	$ 31,500
Shares awarded to non-employee directors [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 105.21
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		110,000
Accelerated Vested Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		14,000

Derivative Instruments Volume o

Derivative Instruments Volume of Derivative Activity (Details) - Sharp Energy Inc [Member] $ in Thousands, gal in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) gal	Dec. 31, 2023 USD ($)
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer	12 months
Other Payables to Broker-Dealers and Clearing Organizations | $	$ 1,900	$ 2,100
Swap Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | gal	13.1

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Sep. 30, 2024	Dec. 31, 2022	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Derivative [Line Items]
Energy Marketing Contracts Assets, Current		$ 405		$ 405	$ 1,027
Energy Marketing Contract Liabilities, Current		(633)		(633)	(354)
Notional Amount of Nonderivative Instruments	$ 40,000	50,000	$ 30,000	50,000
Notional Amount Nonderivative Instruments, Total			$ 60,000
Designated as Hedging Instrument [Member] | Mark To Market Energy Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Energy Marketing Contracts Assets, Current		193		193	365
Designated as Hedging Instrument [Member] | Mark To Market Energy Assets [Member] | Propane Swap Agreement [Member]
Derivative [Line Items]
Energy Marketing Contracts Assets, Current		334		334	702
Designated as Hedging Instrument [Member] | Mark-to-market energy liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current		(2,409)		(2,409)	(203)
Designated as Hedging Instrument [Member] | Mark-to-market energy liabilities [Member] | Propane Swap Agreement [Member]
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current		(254)		$ (254)	(1,078)
Sharp Energy Inc [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer				12 months
Other Payables to Broker-Dealers and Clearing Organizations		$ 1,900		$ 1,900	$ 2,100
Interest Rate Swap Rate, High Range [Member]
Derivative [Line Items]
Fixed Swap Rate		3.97%	0.205%	3.97%	0.17%	3.98%
Interest Rate Swap Rate, Low Range [Member]
Derivative [Line Items]
Fixed Swap Rate			0.20%

Derivative Instruments - Fair V

Derivative Instruments - Fair Values of Derivative Contracts Recorded in Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Energy Marketing Contracts Assets, Current		$ 405	$ 1,027
Energy Marketing Contract Liabilities, Current		633	354
Energy Marketing Contract Liabilities, Total	[1]	2,663	1,281
Energy Marketing Contracts Assets, Total	[2]	527	1,067
Mark To Market Energy Assets [Member] | Propane Swap Agreement [Member] | Derivatives designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Energy Marketing Contracts Assets, Current		334	702
Mark To Market Energy Assets [Member] | Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Energy Marketing Contracts Assets, Current		193	365
Mark-to-market energy liabilities [Member] | Propane Swap Agreement [Member] | Derivatives designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Energy Marketing Contract Liabilities, Current		254	1,078
Mark-to-market energy liabilities [Member] | Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Energy Marketing Contract Liabilities, Current		$ 2,409	$ 203
[1] (1) Derivative liabilities, at fair value, include $0.6 million in current liabilities in the condensed consolidated balance sheet at September 30, 2024 and $0.4 million at December 31, 2023, with the remainder of the balances classified as long-term. (1) Derivative assets, at fair value, include $0.4 million in current assets in the condensed consolidated balance sheet at September 30, 2024 and $1.0 million at

Derivative Instruments - Effect

Derivative Instruments - Effects of Gains and Losses from Derivative Instruments on Condensed Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 150	$ (292)	$ 1,535	$ 74
Cost of Sales [Member] | Derivatives designated as hedging instrument [Member] | Propane Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(87)	(452)	1,263	(1,011)
Interest Expense [Member] | Derivatives designated as hedging instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	237	160	579	352
Revenues | Derivatives designated as hedging instrument [Member] | Propane Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 0	$ 0	$ (307)	$ 733

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Investments	$ 14,156	$ 12,282
Energy Marketing Contracts Assets, Current	405	1,027
Liabilities:
Energy Marketing Contract Liabilities, Current	633	354
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Assets, Fair Value Disclosure	13,039	10,793
Quoted Prices in Active Markets (Level 1) [Member] | Equity Securities [Member]
Assets:
Investments	23	21
Quoted Prices in Active Markets (Level 1) [Member] | Investments - Mutual funds and other [Member]
Assets:
Investments	13,016	10,772
Quoted Prices in Active Markets (Level 1) [Member] | Total Investments [Member]
Assets:
Investments	13,039	10,793
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, Fair Value Disclosure	527	1,067
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, Fair Value Disclosure	1,116	1,489
Significant Unobservable Inputs (Level 3) [Member] | Investments in guaranteed income fund [Member]
Assets:
Investments	1,116	1,489
Significant Unobservable Inputs (Level 3) [Member] | Total Investments [Member]
Assets:
Investments	1,116	1,489
Recurring [Member]
Assets:
Assets, Fair Value Disclosure	14,682	13,349
Liabilities:
Energy Marketing Contract Liabilities, Current		1,281
Recurring [Member] | Equity Securities [Member]
Assets:
Investments	23	21
Recurring [Member] | Investments in guaranteed income fund [Member]
Assets:
Investments	1,116	1,489
Recurring [Member] | Investments - Mutual funds and other [Member]
Assets:
Investments		10,772
Recurring [Member] | Total Investments [Member]
Assets:
Investments	14,155	12,282
Recurring [Member] | Mark To Market Energy Assets incl. natural gas and swap agreements[Member]
Assets:
Derivative assets	$ 527	$ 1,067

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Changes in Fair Value of Investments (Detail) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		$ 14,156	$ 12,282
Energy Marketing Contract Liabilities, Current		633	354
Energy Marketing Contract Liabilities, Total	[1]	2,663	1,281
Energy Marketing Contracts Assets, Total	[2]	527	1,067
Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure		13,039	10,793
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure		527	1,067
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure		1,116	1,489
Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure		14,682	13,349
Energy Marketing Contract Liabilities, Current			1,281
Equity Securities [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		23	21
Equity Securities [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		23	21
Investments in guaranteed income fund [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		1,116	1,489
Investments in guaranteed income fund [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		1,116	1,489
Investments - Mutual funds and other [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		13,016	10,772
Investments - Mutual funds and other [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value			10,772
Total Investments [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		13,039	10,793
Total Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		1,116	1,489
Total Investments [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value		14,155	12,282
Mark To Market Energy Assets Including Put Option [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset		$ 527	$ 1,067
[1] (1) Derivative liabilities, at fair value, include $0.6 million in current liabilities in the condensed consolidated balance sheet at September 30, 2024 and $0.4 million at December 31, 2023, with the remainder of the balances classified as long-term. (1) Derivative assets, at fair value, include $0.4 million in current assets in the condensed consolidated balance sheet at September 30, 2024 and $1.0 million at

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Long-term debt including current maturities	$ 1,200	$ 1,200

Long-Term Debt - Outstanding Lo

Long-Term Debt - Outstanding Long-Term Debt (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total long-term debt	$ (1,200,000)	$ (1,200,000)
Debt Instrument, Unused Borrowing Capacity, Amount	255,000
Total Long-term debt	1,191,478	1,205,580
Less: current maturities	(18,522)	(18,505)
Less: debt issuance costs	3,329	3,753
Total long-term debt, net of current maturities	$ 1,172,956	1,187,075
Debt Instrument, Interest Rate, Stated Percentage	6.54%
Proceeds from Issuance of Senior Long-Term Debt	$ 550,000
5.93% note, due October 31, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.93%
Debt instrument, maturity date	Oct. 31, 2023
5.68% note, due June 30, 2026 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (5,800)	(8,700)
Debt Instrument, Interest Rate, Stated Percentage	5.68%
Debt instrument, maturity date	Jun. 30, 2026
6.43% note, due May 2, 2028 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (2,800)	(3,500)
Debt Instrument, Interest Rate, Stated Percentage	6.43%
Debt instrument, maturity date	May 02, 2028
3.73% note, due December 16, 2028 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (10,000)	(10,000)
Debt Instrument, Interest Rate, Stated Percentage	3.73%
Debt instrument, maturity date	Dec. 16, 2028
3.88% note, due May 15, 2029 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (25,000)	(30,000)
Debt Instrument, Interest Rate, Stated Percentage	3.88%
Debt instrument, maturity date	May 15, 2029
3.25% note, due April 30, 2032 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (54,250)	(59,500)
3.48% note, due May 31, 2038 [Member]
Debt Instrument [Line Items]
Total long-term debt	(50,000)	(50,000)
Uncollateralized Senior Note Due November Two Thousand Thirty Eight [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (50,000)	(50,000)
Debt Instrument, Interest Rate, Stated Percentage	3.58%
Debt instrument, maturity date	Nov. 30, 2038
Uncollateralized Senior Note Due July Two Thousand Thirty Five
Debt Instrument [Line Items]
Total long-term debt	$ (50,000)	(50,000)
Debt Instrument, Interest Rate, Stated Percentage	3%
Debt instrument, maturity date	Jul. 15, 2035
Uncollateralized Senior Note Due August Two Thousand Thirty Five
Debt Instrument [Line Items]
Total long-term debt	$ (40,000)	(40,000)
Debt Instrument, Interest Rate, Stated Percentage	2.96%
Debt instrument, maturity date	Aug. 15, 2035
Uncollateralized Senior Note Due November Two Thousand Thirty Nine
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Equipment Security Note
Debt Instrument [Line Items]
Total long-term debt	$ (6,957)	(7,633)
Debt Instrument, Interest Rate, Stated Percentage	2.46%
Debt instrument, maturity date	Sep. 24, 2031
Uncollateralized Senior Note Due January Two Thousand Thirty Seven
Debt Instrument [Line Items]
Total long-term debt	$ (50,000)	(50,000)
Debt Instrument, Interest Rate, Stated Percentage	2.49%
Debt instrument, maturity date	Jan. 25, 2037
Uncollateralized Senior Note Due March 15, 2042
Debt Instrument [Line Items]
Total long-term debt	$ (50,000)	(50,000)
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Debt instrument, maturity date	Mar. 15, 2042
Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Total long-term debt	$ (80,000)
Debt Instrument, Interest Rate, Stated Percentage	5.43%
Debt instrument, maturity date	Mar. 14, 2038
Uncollateralized Senior Note Due March 14, 2038 [Abstract]
Debt Instrument [Line Items]
Total long-term debt		(80,000)
Uncollateralized Senior Note Due December 2026
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Debt Instrument, Interest Rate, Stated Percentage	6.39%
Debt instrument, maturity date	Dec. 31, 2026
Uncollateralized Senior Note Due December 2027
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Debt Instrument, Interest Rate, Stated Percentage	6.44%
Debt instrument, maturity date	Dec. 31, 2027
Uncollateralized Senior Note Due December 2028
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Debt Instrument, Interest Rate, Stated Percentage	6.45%
Debt instrument, maturity date	Dec. 31, 2028
Uncollateralized Senior Note Due December 2030
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Debt Instrument, Interest Rate, Stated Percentage	6.62%
Debt instrument, maturity date	Dec. 31, 2030
Uncollateralized Senior Note Due December 2033
Debt Instrument [Line Items]
Total long-term debt	$ (100,000)	(100,000)
Debt Instrument, Interest Rate, Stated Percentage	6.71%
Debt instrument, maturity date	Dec. 31, 2033
Uncollateralized Senior Note Due December 2038
Debt Instrument [Line Items]
Total long-term debt	$ (50,000)	(50,000)
Debt Instrument, Interest Rate, Stated Percentage	6.73%
Debt instrument, maturity date	Dec. 31, 2038
Term Note Due January Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Total long-term debt	$ (70,000)	$ (70,000)
Prudential [Member] | Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Total long-term debt	$ (80,000)

Long-Term Debt - Outstanding _2

Long-Term Debt - Outstanding Long-Term Debt- Supplemental Information (Detail)	9 Months Ended
	Sep. 30, 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	(6.54%)
5.93% note, due October 31, 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Oct. 31, 2023
Debt Instrument, Interest Rate, Stated Percentage	(5.93%)
5.68% note, due June 30, 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Jun. 30, 2026
Debt Instrument, Interest Rate, Stated Percentage	(5.68%)
6.43% note, due May 2, 2028 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	May 02, 2028
Debt Instrument, Interest Rate, Stated Percentage	(6.43%)
3.73% note, due December 16, 2028 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 16, 2028
Debt Instrument, Interest Rate, Stated Percentage	(3.73%)
3.88% note, due May 15, 2029 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	May 15, 2029
Debt Instrument, Interest Rate, Stated Percentage	(3.88%)
3.25% due April 30, 2032 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Apr. 30, 2032
Debt Instrument, Interest Rate, Stated Percentage	(3.25%)
3.48% note, due May 31, 2038 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	May 31, 2038
Debt Instrument, Interest Rate, Stated Percentage	(3.48%)
Uncollateralized Senior Note Due November Two Thousand Thirty Eight [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Nov. 30, 2038
Debt Instrument, Interest Rate, Stated Percentage	(3.58%)
Uncollateralized Senior Note Due August Two Thousand Thirty Nine [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Aug. 20, 2039
Debt Instrument, Interest Rate, Stated Percentage	(3.98%)
Uncollateralized Senior Note Due December Two Thousand Thirty Four [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 20, 2034
Debt Instrument, Interest Rate, Stated Percentage	(2.98%)
Uncollateralized Senior Note Due July Two Thousand Thirty Five
Debt Instrument [Line Items]
Debt instrument, maturity date	Jul. 15, 2035
Debt Instrument, Interest Rate, Stated Percentage	(3.00%)
Uncollateralized Senior Note Due August Two Thousand Thirty Five
Debt Instrument [Line Items]
Debt instrument, maturity date	Aug. 15, 2035
Debt Instrument, Interest Rate, Stated Percentage	(2.96%)
Equipment Security Note
Debt Instrument [Line Items]
Debt instrument, maturity date	Sep. 24, 2031
Debt Instrument, Interest Rate, Stated Percentage	(2.46%)
Uncollateralized Senior Note Due January Two Thousand Thirty Seven
Debt Instrument [Line Items]
Debt instrument, maturity date	Jan. 25, 2037
Debt Instrument, Interest Rate, Stated Percentage	(2.49%)
Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Debt instrument, maturity date	Mar. 14, 2038
Debt Instrument, Interest Rate, Stated Percentage	(5.43%)

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Document Period End Date	Sep. 30, 2024
Long-term debt including current maturities	$ 1,200,000	$ 1,200,000
Debt Instrument, Interest Rate, Stated Percentage	6.54%
Debt Instrument, Unused Borrowing Capacity, Amount	$ 255,000
Short-term borrowing	$ 214,753	179,853
Uncollateralized Senior Note Due December Two Thousand Thirty Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.98%
Debt instrument, maturity date	Dec. 20, 2034
Term Note Due January Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 70,000	70,000
3.48% note, due May 31, 2038 [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	50,000	50,000
3.25% note, due April 30, 2032 [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	54,250	59,500
Equipment Security Note
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 6,957	7,633
Debt Instrument, Interest Rate, Stated Percentage	2.46%
Debt instrument, maturity date	Sep. 24, 2031
Uncollateralized Senior Note Due March 15, 2042
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 50,000	50,000
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Debt instrument, maturity date	Mar. 15, 2042
Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 80,000
Debt Instrument, Interest Rate, Stated Percentage	5.43%
Debt instrument, maturity date	Mar. 14, 2038
Uncollateralized Senior Note Due January Two Thousand Thirty Seven
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 50,000	$ 50,000
Debt Instrument, Interest Rate, Stated Percentage	2.49%
Debt instrument, maturity date	Jan. 25, 2037
Uncollateralized Senior Note Due October 2029
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Prudential [Member] | Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 80,000
Prudential [Member] | Uncollateralized Senior Note Due October 2029
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 100,000

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Sep. 30, 2024	Dec. 31, 2022	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Short-term Debt [Line Items]
Notional Amount of Nonderivative Instruments	$ 40,000,000	$ 50,000,000	$ 30,000,000	$ 50,000,000
Line of Credit Facility, Remaining Borrowing Capacity		232,200,000		232,200,000
Short-term borrowing		$ 214,753,000		$ 214,753,000	$ 179,853,000
Short-term Debt, Weighted Average Interest Rate, at Point in Time		5.35%		5.35%	5.83%
Draws on letters of credit				$ 6,300,000
Debt Instrument, Interest Rate, Stated Percentage		6.54%		6.54%
Revolving Line of Credit, Short-term
Short-term Debt [Line Items]
Aggregate Investment, Maximum		$ 250,000,000		$ 250,000,000
Interest Rate Credit Adjustment		10		10
Line of Credit Facility, Interest Rate Description				1.05 percent
3.48% note, due May 31, 2038 [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.48%		3.48%
Revolving Line of Credit, Total
Short-term Debt [Line Items]
Aggregate Investment, Maximum		$ 450,000,000		$ 450,000,000
Revolving Line of Credit, 5 year
Short-term Debt [Line Items]
Aggregate Investment, Maximum		200,000,000		$ 200,000,000
Line of Credit Facility, Interest Rate Description				1.25 percent
Committed Line of Credit Facility Two [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 0.75 percent
Committed Line of Credit Facility Three [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				Lender's base rate, plus 0.75 percent
Committed Line of Credit Facility Five [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				Lender's base rate, plus 0.85 percent
Committed Line of Credit Facility Four [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 1.125 percent
Committed Line of Credit Facility Six [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Seven [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Eight [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Nine [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility One [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR rate, plus 0.75 percent
Revolving Credit Facility
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 450,000,000		$ 450,000,000
Interest Rate Swap Rate, Low Range [Member]
Short-term Debt [Line Items]
Fixed Swap Rate			0.20%
Interest Rate Swap Rate, High Range [Member]
Short-term Debt [Line Items]
Fixed Swap Rate		3.97%	0.205%	3.97%	0.17%	3.98%
Florida City Gas | Regulated Energy [Member]
Short-term Debt [Line Items]
Bridge Loan		$ 965,000,000		$ 965,000,000
Line of Credit Facility [Line Items]
Bridge Loan		$ 965,000,000		$ 965,000,000

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Lease Disclosure [Abstract]
Operating Lease, Right-of-Use Asset	$ 10,945	$ 12,426
Operating Lease, Liability, Current	2,397	2,454
Operating Lease, Liability, Noncurrent	9,157	10,550
Total Operating and Finance Lease Liabilities	$ 11,554	$ 13,004

Leases Leases - Lease Cost Addi

Leases Leases - Lease Cost Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Lease, Cost [Abstract]
Operating Lease, Cost	[1]	$ 750	$ 2,218	$ 2,318
[1](1) Includes short-term leases and variable lease costs, which are not material

Leases Leases - Right of Use As

Leases Leases - Right of Use Asset and Lease Liability Balance Sheet Classification Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Leases - Right of Use Asset and Lease Liability Balance Sheet Classification [Abstract]
Operating Lease, Right-of-Use Asset	$ 10,945	$ 12,426
Operating Lease, Liability, Current	2,397	2,454
Operating Lease, Liability, Noncurrent	9,157	10,550
Total Operating and Finance Lease Liabilities	$ 11,554	$ 13,004

Leases Leases - Weighted Averag

Leases Leases - Weighted Average Remaining Lease Term Additional Information (Details)	Sep. 30, 2024	Dec. 31, 2023
Leases - Weighted Average Remaining Lease term Additional Information [Abstract]
Operating Lease, Weighted Average Discount Rate, Percent	3.50%	3.50%
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days	8 years 1 month 6 days

Leases Leases - Cash Flow Addit

Leases Leases - Cash Flow Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Leases - Cash Flow Additional Information [Abstract]
Operating Cash Flow from Operating Leases	$ 2,204	$ 2,196

Leases Leases - Schedule of Fut

Leases Leases - Schedule of Future Maturities Additional Information (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Leases - Schedule of Future Maturities Additional Information [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 725	[1]
Lessee, Operating Lease, Liability, to be Paid, Year One	2,442	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,863	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Three	1,613	[1]
Lessee, Operating Lease, Liability, Payments, Due	13,122	[1]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(1,568)
Operating Lease, Liability	11,554	[1]
Lessee Future Operating Lease Option Payments	2,100
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,236	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,147	[1]
Lessee, Operating Lease, Liability, to be Paid, after Year Five	$ 4,096	[1]
[1] Operating lease payments include $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.