Chesapeake Utilities (CPK) 10-Q 3 Aug 23 2023 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Jul. 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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		17,796,741
Entity Central Index Key	0000019745
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating Revenues
Regulated Energy	$ 101,141	$ 92,193	$ 243,411	$ 220,084
Unregulated Energy and other	34,452	47,277	110,311	142,266
Total Operating Revenues	135,593	139,470	353,722	362,350
Operating Expenses
Natural gas and electric costs	23,886	21,573	79,174	67,016
Propane and natural gas costs	11,907	25,543	45,208	77,279
Operations	42,163	38,002	86,930	80,796
Maintenance	5,258	4,507	10,362	8,772
Depreciation and amortization	17,303	17,216	34,486	34,193
Other taxes	6,730	6,160	14,301	12,960
Total Operating Expenses	107,247	113,001	270,461	281,016
Total operating income	28,346	26,469	83,261	81,334
Other income, net	831	2,584	1,107	3,498
Interest charges	6,964	5,825	14,196	11,164
Income Before Income Taxes	22,213	23,228	70,172	73,668
Income Taxes	6,080	6,177	17,695	19,683
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Weighted Average Common Shares Outstanding:
Basic (shares)	17,794,320	17,730,833	17,777,203	17,704,592
Diluted (shares)	17,852,024	17,809,871	17,841,954	17,785,629
Earnings Per Share of Common Stock:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.91	$ 0.96	$ 2.95	$ 3.05
Basic (in dollars per share)	0.91	0.96	2.95	3.05
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share	0.90	0.96	2.94	3.04
Diluted (in dollars per share)	$ 0.90	$ 0.96	$ 2.94	$ 3.04

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $3 and $6, $5 and $13, respectively	12	18	21	35
Other comprehensive income (loss)	(1,076)	(480)	(1,680)	67
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	15,057	16,571	50,797	54,052
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(247)	(2,139)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			247	2,139
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(1,433)	2,206
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $3 and $6, $5 and $13, respectively	12	18	21	35
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	(94)	0	(142)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	94	0	142	0
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	313	(205)	(126)	(2,174)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(313)	205	126	2,174
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2,065)	(293)	(2,045)	2,206
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			(142)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			142	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ 758	$ 0	$ 612	$ 0

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Other Comprehensive Income [Abstract]
Amortization of prior service cost, tax	$ 3	$ 6	$ 5	$ 13
Net gain, tax	0	0	0	0
Unrealized (loss)/gain on commodity contract cash flow hedges, tax	(784)	(110)	(775)	826
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	267	0	213	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service cost, tax	3	6	5	13
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	(784)	(110)	(775)	826
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	267	0	213	0
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	119	(78)	(48)	(830)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	119	(78)	(48)	(830)
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	(33)	0	(50)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ (33)	$ 0	$ (50)	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023		Dec. 31, 2022
Property, Plant and Equipment
Regulated Energy	$ 1,868,763		$ 1,802,999
Unregulated Energy	402,352		393,215
Other businesses and eliminations	29,213		29,890
Total property, plant and equipment	2,300,328		2,226,104
Less: Accumulated depreciation and amortization	(489,724)		(462,926)
Property, Plant and Equipment, Net	1,871,182		1,810,473
Current Assets
Cash and cash equivalents	4,169		6,204
Trade and other receivables	45,399		62,881
Accounts Receivable, Allowance for Credit Loss, Current	(2,692)		(2,877)
Accounts Receivable, before Allowance for Credit Loss, Current	48,091		65,758
Accrued revenue	15,875		29,206
Propane inventory, at average cost	6,492		9,365
Other inventory, at average cost	17,873		16,896
Regulatory assets	26,343		41,439
Storage gas prepayments	3,208		6,364
Income taxes receivable	1,276		2,541
Prepaid expenses	12,496		15,865
Derivative assets, at fair value	1,704		2,787
Other current assets	1,934		428
Total current assets	136,769		193,976
Deferred Charges and Other Assets
Goodwill	46,213		46,213
Other intangible assets, net	16,965		17,859
Investments, at fair value	11,693		10,576
Operating Lease, Right-of-Use Asset	13,432		14,421
Regulatory assets	95,985		108,214
Receivables and other deferred charges	12,111		12,323
Total deferred charges and other assets	196,539		210,588
Total Assets	2,204,490		2,215,037
Stockholders’ equity
Preferred stock, par value $0.01 per share (authorized 2,000,000 shares), no shares issued and outstanding	0		0
Common stock, par value $0.4867 per share (authorized 50,000,000 shares)	8,662		8,635
Additional paid-in capital	380,830		380,036
Retained earnings	477,795		445,509
Accumulated other comprehensive income (loss)	(3,059)		(1,379)
Deferred compensation obligation	9,001		7,060
Treasury stock	(9,001)		(7,060)
Total stockholders’ equity	864,228	[1]	832,801
Total capitalization	1,509,970		1,411,189
Current Liabilities
Less: current maturities	19,994		21,483
Short-term borrowing	95,807		202,157
Accounts payable	44,173		61,496
Customer deposits and refunds	38,468		37,152
Accrued interest	3,429		3,349
Dividends payable	10,500		9,492
Accrued compensation	9,772		14,660
Regulatory liabilities	12,894		5,031
Derivative liabilities, at fair value	2,178		585
Other accrued liabilities	17,942		13,618
Total current liabilities	255,157		369,023
Deferred Credits and Other Liabilities
Deferred income taxes	261,215		256,167
Regulatory liabilities	144,275		142,989
Environmental liabilities	2,512		3,272
Other pension and benefit costs	17,890		16,965
Operating Lease, Liability, Noncurrent	11,585		12,392
Deferred investment tax credits and other liabilities	1,412		1,410
Total deferred credits and other liabilities	439,363		434,825
Environmental and other commitments and contingencies (Notes 5 and 6)
Total Capitalization and Liabilities	2,204,490		2,215,037
Other businesses and eliminations	29,213		29,890
Property, Plant and Equipment, Gross	2,300,328		2,226,104
Construction Work in Progress	60,578		47,295
Property, Plant and Equipment, Net	1,871,182		1,810,473
Trade and other receivables	45,399		62,881
Income taxes receivable	1,276		2,541
Other current assets	1,934		428
Assets, Current	136,769		193,976
Receivables and other deferred charges	12,111		12,323
Deferred Charges And Other Assets	196,539		210,588
Total identifiable assets	2,204,490		2,215,037
Regulated Energy	1,868,763		1,802,999
Unregulated Energy	402,352		393,215
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	489,724		462,926
Cash and cash equivalents	4,169		6,204
Accounts Receivable, before Allowance for Credit Loss, Current	48,091		65,758
Allowance for uncollectible accounts	2,692		2,877
Accrued revenue	15,875		29,206
Propane inventory, at average cost	6,492		9,365
Other inventory, at average cost	17,873		16,896
Regulatory assets	26,343		41,439
Storage gas prepayments	3,208		6,364
Prepaid expenses	12,496		15,865
Derivative assets, at fair value	1,704		2,787
Goodwill	46,213		46,213
Other intangible assets, net	16,965		17,859
Investments, at fair value	11,693		10,576
Operating Lease, Right-of-Use Asset	13,432		14,421
Regulatory assets	95,985		108,214
Preferred stock, par value $0.01 per share (authorized 2,000,000 shares), no shares issued and outstanding	0		0
Stockholders' Equity Attributable to Parent	864,228	[1]	832,801
Capitalization, Long-term Debt and Equity	1,509,970		1,411,189
Accounts payable	44,173		61,496
Other accrued liabilities	17,942		13,618
Liabilities, Current	255,157		369,023
Regulatory liabilities	144,275		142,989
Operating Lease, Liability, Noncurrent	11,585		12,392
Deferred investment tax credits and other liabilities	1,412		1,410
Deferred Credits and Other Liabilities	439,363		434,825
Environmental and other commitments and contingencies (Notes 5 and 6)
Liabilities and Equity	2,204,490		2,215,037
Common stock, par value $0.4867 per share (authorized 50,000,000 shares)	8,662		8,635
Additional paid-in capital	380,830		380,036
Retained earnings	477,795		445,509
Accumulated other comprehensive income (loss)	(3,059)		(1,379)
Deferred compensation obligation	9,001		7,060
Treasury Stock, Value	9,001		7,060
Long-term Debt and Capital Lease Obligations, Net of Current Maturities	645,742		578,388
Less: current maturities	19,994		21,483
Short-term borrowing	95,807		202,157
Customer deposits and refunds	38,468		37,152
Accrued interest	3,429		3,349
Dividends payable	10,500		9,492
Accrued compensation	9,772		14,660
Regulatory liabilities	12,894		5,031
Energy Marketing Contract Liabilities, Current	2,178		585
Deferred income taxes	261,215		256,167
Environmental liabilities	2,512		3,272
Other pension and benefit costs	17,890		16,965
Energy Marketing Contracts Assets, Noncurrent	140		982
Energy Marketing Contract Liabilities, Noncurrent	$ 474		$ 1,630
[1]2,000,000 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 statements of stockholders’ equity.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 2,692	$ 2,877
Common stock, par value (in dollars per share)	$ 0.4867	$ 0.4867
Common stock, shares authorized (shares)	50,000,000	50,000,000
Preferred Stock, Shares Authorized	2,000,000	2,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Issued	0	0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities
Net Income	$ 52,477	$ 53,985
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,486	34,193
Depreciation and accretion included in other costs	5,714	5,781
Deferred income taxes	5,695	11,434
Realized gain on commodity contracts and sale of assets	(1,032)	(6,980)
Unrealized (gain) loss on investments/commodity contracts	(1,131)	1,956
Employee benefits and compensation	218	(520)
Share-based compensation	2,919	3,555
Changes in assets and liabilities:
Accounts receivable and accrued revenue	30,812	24,766
Propane inventory, storage gas and other inventory	5,052	270
Regulatory assets/liabilities, net	28,796	(6,405)
Prepaid expenses and other current assets	2,953	10,326
Accounts payable and other accrued liabilities	(18,273)	(2,274)
Income taxes receivable/payable	1,265	5,107
Customer deposits and refunds	1,316	(1,999)
Accrued compensation	(5,061)	(6,266)
Other assets and liabilities, net	2,777	(3,134)
Net cash provided by operating activities	148,983	123,795
Investing Activities
Property, plant and equipment expenditures	(90,265)	(65,087)
Proceeds from sale of assets	2,034	3,367
Environmental expenditures	760	441
Net cash used in investing activities	(88,991)	(64,167)
Financing Activities
Common stock dividends	(19,009)	(16,575)
Issuance of stock under the Dividend Reinvestment Plan, net of offering fees	(14)	4,259
Tax withholding payments related to net settled stock compensation	(2,455)	(2,838)
Change in cash overdrafts due to outstanding checks	(2,157)	(1,202)
Net repayments under line of credit agreements	(104,194)	(83,424)
Proceeds from long-term debt, net of offering fees	79,840	49,890
Repayment of long-term debt	(14,038)	(10,528)
Net cash used in financing activities	(62,027)	(60,418)
Net Increase (Decrease) in Cash and Cash Equivalents	(2,035)	(790)
Cash and Cash Equivalents—Beginning of Period	6,204	4,976
Cash and Cash Equivalents—End of Period	4,169	4,186
Payments to Acquire Businesses, Gross	$ 0	$ (2,006)

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		116,238
Common Stock, Dividends, Per Share, Declared		$ 1.015
Beginning Balances (shares) at Dec. 31, 2021				17,655,410
Beginning Balances at Dec. 31, 2021		$ 774,130		$ 8,593		$ 371,162	$ 393,072	$ 1,303	$ 7,240		$ (7,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		53,985					53,985
Other comprehensive income (loss)		67						67
Other Comprehensive Income (Loss), Net of Tax		67
Dividend declared		(18,224)					(18,224)
Retirement savings plan and dividend reinvestment plan (shares)				33,846
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan				$ 17		4,613
Share-based compensation (shares)				45,538
Share-based compensation and tax benefit		4,630		$ 22		1,091
Treasury stock activities		1,113					0		(222)		222
Ending Balances (shares) at Jun. 30, 2022	[1]			17,734,794
Ending Balances at Jun. 30, 2022		$ 815,701	[1]	$ 8,632	[1]	376,866	428,833	1,370	7,018		(7,018)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		21,832
Common Stock, Dividends, Per Share, Declared		$ 0.5350
Beginning Balances (shares) at Mar. 31, 2022				17,719,388
Beginning Balances at Mar. 31, 2022		$ 805,512		$ 8,624		373,694	421,344	1,850	6,477	$ (6,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		17,051					17,051
Other comprehensive income (loss)		(480)						(480)
Other Comprehensive Income (Loss), Net of Tax		(480)
Dividend declared		(9,562)					(9,562)
Retirement savings plan and dividend reinvestment plan (shares)				8,886
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		1,208		$ 5		1,203
Share-based compensation (shares)				6,520
Share-based compensation and tax benefit		1,972		$ 3		1,969
Treasury stock activities							0		541		(541)
Ending Balances (shares) at Jun. 30, 2022	[1]			17,734,794
Ending Balances at Jun. 30, 2022		$ 815,701	[1]	$ 8,632	[1]	376,866	428,833	1,370	7,018		(7,018)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		110,835
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Shares Held In Trust For Deferred Compensation Plan		108,143
Common Stock, Dividends, Per Share, Declared		$ 1.125
Beginning Balances (shares) at Dec. 31, 2022	[1],[2]			17,741,418
Beginning Balances at Dec. 31, 2022		$ 832,801		$ 8,635	[1],[2]	380,036	445,509	(1,379)	7,060		(7,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		52,477					52,477
Other comprehensive income (loss)		(1,680)						(1,680)
Other Comprehensive Income (Loss), Net of Tax		(1,680)
Dividend declared		(20,191)					(20,191)
Retirement savings plan and dividend reinvestment plan (shares)				0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		(19)		$ 0		(19)
Share-based compensation (shares)	[3],[4]			55,323
Share-based compensation and tax benefit	[3],[4]	840		$ 27		813
Treasury stock activities							0		1,941		(1,941)
Ending Balances (shares) at Jun. 30, 2023	[1]			17,796,741
Ending Balances at Jun. 30, 2023		$ 864,228	[1]	$ 8,662	[1]	380,830	477,795	(3,059)	9,001		(9,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		19,859
Common Stock, Dividends, Per Share, Declared		$ 0.5900
Beginning Balances (shares) at Mar. 31, 2023				17,789,856
Beginning Balances at Mar. 31, 2023		$ 858,588		$ 8,659		379,703	472,209	(1,983)	8,816		(8,816)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		16,133					16,133
Other comprehensive income (loss)		(1,076)						(1,076)
Other Comprehensive Income (Loss), Net of Tax		(1,076)
Dividend declared		(10,547)					(10,547)
Retirement savings plan and dividend reinvestment plan (shares)				0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		(8)		$ 0		(8)
Share-based compensation (shares)				6,885
Share-based compensation and tax benefit		1,138		$ 3		1,135
Treasury stock activities							0		185		(185)
Ending Balances (shares) at Jun. 30, 2023	[1]			17,796,741
Ending Balances at Jun. 30, 2023		$ 864,228	[1]	$ 8,662	[1]	$ 380,830	$ 477,795	$ (3,059)	$ 9,001		$ (9,001)
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		110,277
[1]2,000,000 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 statements of stockholders’ equity. [2]Includes 110,277, 108,143, 110,835, and 116,238 shares at June 30, 2023, December 31, 2022, June 30, 2022 and December 31, 2021, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan. (3) Can include shares issued under the Retirement Savings Plan, DRIP and ATM equity issuances.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Unaudited) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Dividend declared (in dollars per share)	$ 0.5900	$ 0.5350	$ 1.125	$ 1.015
Deferred compensation plan held Rabbi Trust (shares)	110,277	110,835	110,277	110,835	108,143	116,238
Preferred Stock, Shares Authorized	2,000,000		2,000,000		2,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01		$ 0.01
Shares issued under the performance incentive plan withheld for employee taxes (shares)			19,859	21,832

Summary of Accounting Policies

Summary of Accounting Policies	6 Months Ended
	Jun. 30, 2023
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, 2022. 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 changed 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 Sha

Calculation of Earnings Per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Calculation of Earnings Per Share	Calculation of Earnings Per Share Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands, except shares and per share data) Calculation of Basic Earnings Per Share: Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 Weighted average shares outstanding 17,794,320 17,730,833 17,777,203 17,704,592 Basic Earnings Per Share $ 0.91 $ 0.96 $ 2.95 $ 3.05 Calculation of Diluted Earnings Per Share: Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 Reconciliation of Denominator: Weighted shares outstanding—Basic 17,794,320 17,730,833 17,777,203 17,704,592 Effect of dilutive securities—Share-based compensation 57,704 79,038 64,751 81,037 Adjusted denominator—Diluted 17,852,024 17,809,871 17,841,954 17,785,629 Diluted Earnings Per Share $ 0.90 $ 0.96 $ 2.94 $ 3.04

Acquisitions and Divestitures (

Acquisitions and Divestitures (Notes)	6 Months Ended
	Jun. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Business Combination Disclosure [Text Block]	3. Acquisitions Acquisition of Davenport Energy In June 2022, Sharp acquired the propane operating assets of Davenport Energy's Siler City, North Carolina propane division for approximately $2.0 million. Through this acquisition, we expanded our operating footprint further into North Carolina, where customers are served by Sharp Energy’s Diversified Energy division. Sharp added approximately 850 customers, along with distribution of approximately 0.4 million gallons of propane annually. We recorded $1.5 million in property plant and equipment, $0.5 million in goodwill, and immaterial amounts associated with customer relationships and non-compete agreements, all of which are deductible for income tax purposes. All amounts initially recorded in connection with this acquisition are now final as a result of the conclusion of the measurement period; no further adjustments were necessary. The financial results associated with this acquisition are included within our propane distribution operations within our Unregulated Energy segment. Acquisition of Planet Found Energy Development In October 2022, we acquired Planet Found Energy Development, LLC ("Planet Found") for $9.5 million. In connection with this acquisition, we recorded a $0.9 million liability which is subject to the seller's adherence to various provisions contained in the purchase agreement through the first anniversary of the transaction closing. We accounted for this acquisition as a business combination within our Unregulated Energy segment beginning in the fourth quarter of 2022. Planet Found's farm scale anaerobic digestion pilot system and technology produces biogas from 1,200 tons of poultry litter annually, which can be used to create renewable energy in the form of electricity or upgraded to renewable natural gas. The transaction will accelerate our efforts in converting poultry waste to renewable, sustainable energy while simultaneously improving the local environments in our service territories. The operating revenues and operating income of Planet Found were not material to our consolidated results for the three and six months ended June 30, 2023. In connection with this acquisition, we recorded $4.4 million in intangible assets associated primarily with intellectual property and non-compete agreements, $4.0 million in property plant and equipment, $1.1 million in goodwill, and less than $0.1 million in working capital, all of which are deductible for income tax purposes. The amounts recorded in conjunction with the acquisition are preliminary, and subject to adjustment based on contractual provisions and finalization prior to the first anniversary of the transaction closing.

Rates and Other Regulatory Acti

Rates and Other Regulatory Activities	6 Months Ended
	Jun. 30, 2023
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 Refer to the additional details below pertaining to the Customer Information System Regulatory Asset Petition and COVID-19 impact. Maryland Ocean City Maryland Reinforcement: In March 2022, we filed a Section 7(f) - Request for Service Area Determination with the FERC regarding plans to extend our natural gas facilities across the Delaware/Maryland state line from Sussex County, Delaware, to Worcester County, Maryland, to provide a secondary feed to Sandpiper Energy. The FERC approved the Section 7(f) request on August 29, 2022. The project will increase the reliability of the existing distribution system in those areas while also expanding infrastructure to serve new customers. Construction was completed during the second quarter of 2023. 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 will enable 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. Natural Gas Rate Case: In May 2022, our natural gas distribution businesses in Florida filed a consolidated natural gas rate case with the Florida PSC. The application included a request for the following: (i) permanent rate relief of approximately $24.1 million, effective January 1, 2023, (ii) a depreciation study also submitted with filing; (iii) authorization to make certain changes to tariffs to include the consolidation of rates and rate structure across the businesses and to unify the Florida natural gas distribution businesses under FPU; (iv) authorization to retain the acquisition adjustment recorded at the time of the FPU merger in our revenue requirement; and (v) authorization to establish an environmental remediation surcharge for the purposes of addressing future expected remediation costs for FPU MGP sites. In August 2022, interim rates were approved by the Florida PSC in the amount of approximately $7.7 million on an annualized basis, effective for all meter readings in September 2022. The discovery process and subsequent hearings were concluded during the fourth quarter of 2022 and briefs were submitted during the same quarter of 2022. In January 2023, the Florida PSC approved the application for consolidation and permanent rate relief of approximately $17.2 million on an annual basis. Actual rates in connection with the rate relief were approved by the Florida PSC in February 2023 with an effective date of March 1, 2023. Beachside Pipeline Extension: In June 2021, Peninsula Pipeline and Florida City Gas entered into a Transportation Service Agreement for an incremental 10,176 Dts/d of firm service in Indian River County, Florida, to support Florida City Gas’ growth along the Indian River's barrier island. As part of this agreement, Peninsula Pipeline constructed 11.3 miles of pipeline from its existing pipeline in the Sebastian, Florida area, traveling east under the Intercoastal Waterway and southward on the barrier island. The project was placed in-service during April 2023. St.Cloud / Twin Lakes Expansion: In July 2022, Peninsula Pipeline filed a petition with the Florida PSC for approval of its Transportation Service Agreement with FPU, for an additional 2,400 Dt/d of firm service in the St. Cloud, Florida area. As part of this agreement, Peninsula Pipeline will construct a pipeline extension and regulator station for FPU. The extension will be used to support new incremental load due to growth in the area, including providing service, most immediately, to the residential development, Twin Lakes. The expansion will also improve reliability and provide operational benefits to FPU's existing distribution system in the area, supporting future growth. The petition was approved by the Florida PSC in October 2022. We expect this expansion to be placed into service during the third quarter of 2023. 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 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. Lake Wales Pipeline Acquisition : In February 2023, Peninsula Pipeline filed a petition with the Florida PSC for approval of its Transportation Service Agreement with FPU for an additional 9,000 Dt/d of firm service in the Lake Wales, Florida area. The Commission approved the petition in April 2023. Approval of the agreement allowed Peninsula Pipeline to complete the acquisition of the existing pipeline in May 2023 which is being utilized to serve our current natural gas customers as well as enable us to serve new customers. GUARD : 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 have 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 M&R equipment and system reliability projects. In August 2023, the Florida PSC approved the GUARD program, with the exception of reliability projects with an approximate value of $10 million. The remainder of the program was approved as filed, which included $205 million of capital expenditures projected to be spent over a 10-year period. 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 Dt/d of firm service in the Newberry, Florida area. In July 2023, the Florida PSC approved the company's recommendation to proceed with this project. 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. Amendment to Escambia County Agreement : In April of 2023, Peninsula Pipeline filed a petition with the Florida PSC for approval of an amendment to an existing contract with FPU. This amendment will allow Peninsula Pipeline to construct an additional delivery point on a pipeline located in Escambia County. The additional delivery point comes at the request of an FPU customer and will be used to enhance natural gas service in the area. Currently, the petition is under review by the Florida PSC. A decision is expected in the third quarter of 2023. Florida Electric Depreciation Study : The Florida PSC requires electric utilities to file a depreciation study every four years to reevaluate and set depreciation rates for the utility's plant assets. In June 2023, FPU filed a petition with the Florida PSC for approval of it’s proposed depreciation rates. If approved, new rates will become effective retroactively on January 1, 2023. Eastern Shore Southern Expansion Project: In January 2022, Eastern Shore submitted a prior notice filing with the FERC pursuant to blanket certificate procedures, regarding its proposal to install an additional compressor unit and related facilities at Eastern Shore's compressor station in Bridgeville, Sussex County, Delaware. The project will enable Eastern Shore to provide additional firm natural gas transportation service to an existing shipper on its pipeline system. The project obtained FERC approval in December 2022, and is under construction, estimated to go into service in the fourth quarter of 2023. Capital Cost Surcharge : In December 2022, Eastern Shore submitted a filing with the FERC regarding a capital cost surcharge to recover capital costs associated with the replacement of existing Eastern Shore facilities as a result of mandated highway relocation projects as well as compliance with a Pipeline and Hazardous Materials Safety Administration ("PHMSA") regulation. The capital cost surcharge mechanism was approved in Eastern Shore’s last rate case. In conjunction with the filing of this surcharge, a cumulative adjustment to the existing surcharge to reflect additional depreciation was included. The FERC issued an order approving the surcharge as filed on December 19, 2022. The combined revised surcharge became effective January 1, 2023. Various Jurisdictional Activity Related to the Joint Customer Information System Project In July 2022, we filed a joint petition for our natural gas divisions in Maryland (Maryland Division, Sandpiper, and Elkton Gas) for the approval to establish a regulatory asset for non-capitalizable expenses related to the initial development and implementation of our new Customer Information System ("CIS") system. The petition was approved by the Maryland PSC in August 2022. A similar petition for our Florida Regulated Energy businesses was filed during the same time frame and was initially denied. The Florida PSC subsequently approved capitalization of these expenses. Additionally, our Delaware Division has the ability to defer these costs as a regulatory asset. We have completed the system selection process and the CIS implementation began during the first quarter of 2023. COVID-19 Impact In March 2020, the CDC declared a national emergency due to the rapidly growing outbreak of COVID-19. In response to this declaration and the rapid spread of COVID-19 within the United States, federal, state and local governments throughout the country imposed varying degrees of restrictions on social and commercial activity to promote social distancing in an effort to slow the spread of the illness. These restrictions significantly impacted economic conditions in the United States in 2020 and continued to impact economic conditions, to a lesser extent, through 2021 and 2022. Chesapeake Utilities is considered an “essential business,” which allowed us to continue operational activities and construction projects with appropriate safety precautions and personal protective equipment, while being mindful of the social distancing restrictions that were in place. In response to the COVID-19 pandemic and related restrictions, we experienced reduced consumption of energy largely in the commercial and industrial sectors, higher bad debt expenses and incremental expenses associated with COVID-19, including expenditures associated with personal protective equipment and premium pay for field personnel. The additional operating expenses we incurred supported the ongoing delivery of our essential services during the height of the pandemic. In April and May 2020, we were authorized by the Maryland and Delaware PSCs, respectively, to record regulatory assets for COVID-19 related costs which offered us the ability to seek recovery of those costs. In July 2021, the Florida PSC issued an order that approved incremental expenses we incurred due to COVID-19. The order allowed us to establish a regulatory asset in a total amount of $2.1 million as of June 30, 2021 for natural gas and electric distribution operations. The regulatory asset is being amortized over two years and is recovered through the Purchased Gas Adjustment and Swing Service mechanisms for our natural gas distribution businesses and through the Fuel Purchased Power Cost Recovery clause for our electric division. As of June 30, 2023 and December 31, 2022, our total COVID-19 regulatory asset balance was $0.7 million and $1.2 million, respectively. Summary TCJA Table Customer rates for our regulated businesses were adjusted, as approved by the regulators, prior to 2020 with the exception of Elkton Gas, which implemented a one-time bill credit in May 2020. The following table summarizes the regulatory liabilities related to accumulated deferred taxes ("ADIT") associated with TCJA for our regulated businesses as of June 30, 2023 and December 31, 2022: Amount (in thousands) Operation and Regulatory Jurisdiction June 30, 2023 December 31, 2022 Status Eastern Shore (FERC) $34,190 $34,190 Will be addressed in Eastern Shore's next rate case filing. Chesapeake Delaware natural gas division (Delaware PSC) $12,134 $12,230 PSC approved amortization of ADIT in January 2019. Chesapeake Maryland natural gas division (Maryland PSC) $3,644 $3,703 PSC approved amortization of ADIT in May 2018. Sandpiper Energy (Maryland PSC) $3,542 $3,597 PSC approved amortization of ADIT in May 2018. Florida natural gas distribution (Florida PSC) (1) $26,894 $27,179 PSC issued order authorizing amortization and retention of net ADIT liability by the Company in February 2019. FPU electric division (Florida PSC) $4,876 $4,993 In January 2019, PSC issued order approving amortization of ADIT through purchased power cost recovery, storm reserve and rates. Elkton Gas (Maryland PSC) $1,043 $1,059 PSC approved amortization of ADIT in March 2018. (1) In accordance with the Florida PSC approval of our natural gas base rate proceeding, effective March 1, 2023, our natural gas distribution businesses in Florida have been consolidated for rate-making purposes and amounts above are now being presented on a consolidated basis consistent with the final rate order.

Environmental Commitments and C

Environmental Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 and December 31, 2022, we had approximately $3.4 million and $4.3 million, respectively, in environmental liabilities related to the former MGP sites. As of June 30, 2023 and December 31, 2022, we have cumulative regulatory assets of $0.5 million and $0.8 million, respectively, for future recovery of environmental costs for customers. Specific to FPU’s four MGP sites in Key West, Pensacola, Sanford and West Palm Beach, FPU has approval for and has recovered, through a combination of insurance and customer rates, $14.0 million of its environmental costs related to its MGP sites as of June 30, 2023. 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 and the remaining clean-up costs are estimated to be between $0.3 million to $0.9 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 immaterial.

Other Commitments and Contingen

Other Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
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. Our Florida natural gas distribution operations and Eight Flags generation facility have separate asset management agreements with Emera Energy Services, Inc. to manage their natural gas transportation capacity. These agreements are for a 10-year term that commenced in November 2020 and expire in October 2030. Additionally, our Florida natural gas distribution operations have 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 based on specific financial ratios. 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 ratio, it must provide an irrevocable letter of credit or pay all amounts outstanding under the agreement within five business days. FPU’s electric supply agreement with Gulf Power requires FPU to meet the following ratios based on the average of the prior six quarters: (a) funds from operations interest coverage ratio (minimum of two times), and (b) total debt to total capital (maximum of 65 percent). If FPU fails to meet the requirements, it has to provide the supplier a written explanation of actions taken, or proposed to be taken, to become compliant. Failure to comply with the ratios specified in the Gulf Power agreement could also result in FPU having to provide an irrevocable letter of credit. As of June 30, 2023, FPU was in compliance with all of the requirements of its fuel 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 June 30, 2023 was $20.0 million. The aggregate amount guaranteed related to our subsidiaries at June 30, 2023 was approximately $14.2 million with the guarantees expiring on various dates through May 2024. In addition, the Board has authorized us to issue specific purpose corporate guarantees. The amount of specific purpose guarantees outstanding at June 30, 2023 was $4.0 million.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2023
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 the operating results of each segment are regularly reviewed by the chief operating decision maker, our 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 project development activities related to our sustainable energy initiatives. 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 table presents financial information about our reportable segments: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands) Operating Revenues, Unaffiliated Customers Regulated Energy $ 100,657 $ 91,830 $ 242,279 $ 215,888 Unregulated Energy 34,936 47,640 111,443 146,462 Total operating revenues, unaffiliated customers $ 135,593 $ 139,470 $ 353,722 $ 362,350 Intersegment Revenues (1) Regulated Energy $ 484 $ 363 $ 1,132 $ 4,196 Unregulated Energy 5,816 5,823 12,473 7,819 Other businesses 45 85 91 691 Total intersegment revenues $ 6,345 $ 6,271 $ 13,696 $ 12,706 Operating Income Regulated Energy $ 29,291 $ 25,841 $ 66,916 $ 60,539 Unregulated Energy (993) 560 16,252 20,613 Other businesses and eliminations 48 68 93 182 Operating income 28,346 26,469 83,261 81,334 Other income, net 831 2,584 1,107 3,498 Interest charges 6,964 5,825 14,196 11,164 Income Before Income Taxes 22,213 23,228 70,172 73,668 Income Taxes 6,080 6,177 17,695 19,683 Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 (1) All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues. (in thousands) June 30, 2023 December 31, 2022 Identifiable Assets Regulated Energy segment $ 1,707,605 $ 1,716,255 Unregulated Energy segment 448,217 463,239 Other businesses and eliminations 48,668 35,543 Total Identifiable Assets $ 2,204,490 $ 2,215,037

Stockholder's Equity - Accumula

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity Common Stock Issuances We maintain an effective shelf registration statement with the SEC for the issuance of shares under our DRIP and ATM programs. Depending on our capital needs and subject to market conditions, in addition to other possible debt and equity offerings, we may issue additional shares under the direct stock purchase component of the DRIP. In 2022, we issued less than 0.1 million shares at an average price per share of $136.26 and received net proceeds of $4.5 million under the DRIP. In the first six months of 2023, there were no issuances under the DRIP. 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. We expect to execute a new ATM during the third quarter of 2023. We use the net proceeds from our share issuances, after fees, for general corporate purposes, including, but not limited to, financing of capital expenditures, repayment of short-term debt, financing acquisitions, investing in subsidiaries, and general working capital purposes. Accumulated Other Comprehensive Income (Loss) Defined benefit pension and postretirement plan items, unrealized gains (losses) of our propane swap agreements designated as commodity contracts 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 income (loss). The following tables present the changes in the balance of accumulated other comprehensive income (loss) components as of June 30, 2023 and 2022. All amounts in the following tables are presented net of tax. Defined Benefit Commodity Interest Rate Pension and Contracts Swap Postretirement Cash Flow Cash Flow Plan Items Hedges Hedges Total (in thousands) As of December 31, 2022 $ (2,506) $ 1,092 $ 35 $ (1,379) Other comprehensive income (loss) before reclassifications — (2,045) 612 (1,433) Amounts reclassified from accumulated other comprehensive income (loss) 21 (126) (142) (247) Net current-period other comprehensive income (loss) 21 (2,171) 470 (1,680) As of June 30, 2023 $ (2,485) $ (1,079) $ 505 $ (3,059) As of December 31, 2021 $ (3,268) $ 4,571 $ — $ 1,303 Other comprehensive income before reclassifications — 2,206 — 2,206 Amounts reclassified from accumulated other comprehensive income (loss) 35 (2,174) — (2,139) Net prior-period other comprehensive income 35 32 — 67 As of June 30, 2022 $ (3,233) $ 4,603 $ — $ 1,370 Deferred gains or losses for our commodity contracts and interest rate swap cash flow hedges are recognized in earnings upon settlement. Amortization of the net loss related to the defined benefit pension plan and postretirement plans is included in the computation of net periodic costs (benefits). See Note 10, Employee Benefit Plans , for additional details. Gains on commodity contracts classified as cash flow hedges related to our propane swaps are included in the effects of gains and losses from derivative instruments. See Note 12, Derivative Instruments , for additional details.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2023
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. 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 six months ended June 30, 2023 and 2022: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands) Awards to key employees $ 284 $ 1,122 $ 2,440 $ 3,101 Awards to non-employee directors 227 220 479 454 Total compensation expense 511 1,342 2,919 3,555 Less: tax benefit (132) (346) (754) (917) Share-based compensation amounts included in net income $ 379 $ 996 $ 2,165 $ 2,638 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 of the Company, contingent upon various performance goals and subject to SEC transfer restrictions. We currently have several outstanding multi-year performance plans, 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 six months ended June 30, 2023: Number of Shares Weighted Average Outstanding—December 31, 2022 204,149 $ 103.17 Granted 80,752 $ 128.01 Vested (68,302) $ 91.59 Expired (2,053) $ 94.64 Outstanding—June 30, 2023 214,546 $ 116.04 During the six months ended June 30, 2023, we granted awards of 80,752 shares of common stock to key employees under the SICP, including awards granted in February 2023 to key employees appointed in officer positions. The shares granted are multi-year awards that will vest no later than the three-year service period ending December 31, 2025. All of these stock awards are earned based upon the successful achievement of long-term financial results, which are comprised of market-based and performance-based conditions or targets. The fair value of each performance-based condition or target is equal to the market price of our common stock on the grant date of each award. For the market-based conditions, we used the Monte Carlo valuation to estimate the fair value of each market-based award granted. In March 2023, upon the election by certain of our executive officers, 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 2023 for the performance period ended December 31, 2022. 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 19,859 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 $2.5 million. At June 30, 2023, the aggregate intrinsic value of the SICP awards granted to key employees was approximately $25.5 million. At June 30, 2023, there was approximately $8.7 million of unrecognized compensation cost related to these awards, which will be recognized through 2025. 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 2023 each received 765 shares of common stock, respectively, with a weighted average fair value of $124.12 per share. At June 30, 2023, there was approximately $0.8 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 2024.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023, our natural gas and electric distribution operations did not have any outstanding derivative contracts. Volume of Derivative Activity As of June 30, 2023, 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 21.3 Cash flow hedges June 2026 Sharp Propane (gallons) Sales 3.2 Cash flow hedges December 2023 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 2023 through June 2026) 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. We expect to reclassify unrealized losses of approximately $1.1 million from accumulated other comprehensive income (loss) related to our commodity cash flow hedges to earnings during the next 12-month period ended June 30, 2024. 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. Prior to August 2022, our short-term borrowing was based on the 30-day LIBOR rate. In August 2022, we amended and restated our revolver and transitioned the benchmark interest rate to the 30-day SOFR as a result of the expiration of LIBOR. Our prior interest rate swaps were cash settled monthly as the counter-party paid us the 30-day LIBOR rate less the fixed rate. Our interest rate swap is 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 which was classified within our Other Current Assets on the consolidated balance sheet with a balance of $1.4 million as of June 30, 2023. At December 31, 2022, $0.1 million was classified in Other Current Liabilities on the consolidated balance sheet. 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 consolidated balance sheets as of June 30, 2023 and December 31, 2022, are as follows: Derivative Assets Fair Value As Of (in thousands) Balance Sheet Location June 30, 2023 December 31, 2022 Derivatives designated as cash flow hedges Propane swap agreements Derivative assets, at fair value $ 1,068 $ 3,317 Interest rate swap agreements Derivative assets, at fair value 776 452 Total Derivative Assets (1) $ 1,844 $ 3,769 (1) Derivative assets, at fair value include $1.7 million and $2.8 million in current assets in the condensed consolidated balance sheet at June 30, 2023 and December 31, 2022, respectively, with the remainder of the balance classified as long-term. Derivative Liabilities Fair Value As Of (in thousands) Balance Sheet Location June 30, 2023 December 31, 2022 Derivatives designated as cash flow hedges Propane swap agreements Derivative liabilities, at fair value $ 2,556 $ 1,810 Interest rate swap agreements Derivative liabilities, at fair value 96 405 Total Derivative Liabilities (1) $ 2,652 $ 2,215 (1) Derivative liabilities, at fair value include $2.2 million and $0.6 million in current liabilities in the condensed consolidated balance sheet at June 30, 2023 and December 31, 2022, respectively, with the remainder of the balance classified as long-term. The effects of gains and losses from derivative instruments on the condensed consolidated financial statements are as follows: Amount of Gain (Loss) on Derivatives Location of Gain For the Three Months Ended June 30, For the Six Months Ended June 30, (in thousands) (Loss) on Derivatives 2023 2022 2023 2022 Derivatives not designated as hedging instruments Propane swap agreements Unregulated propane and natural gas costs $ — $ — $ — $ 56 Derivatives designated as cash flow hedges Propane swap agreements Revenues — — 733 (826) Propane swap agreements Unregulated propane and natural gas costs (432) 283 (559) 3,830 Propane swap agreements Other comprehensive income (loss) (2,417) (686) (2,994) 28 Interest rate swap agreements Interest expense 127 — 192 — Interest rate swap agreements Other comprehensive income (loss) 898 — 633 — Total $ (1,824) $ (403) $ (1,995) $ 3,088

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 and December 31, 2022: Fair Value Measurements Using: As of June 30, 2023 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 23 $ 23 $ — $ — Investments—guaranteed income fund 1,756 — — 1,756 Investments—mutual funds and other 9,914 9,914 — — Total investments 11,693 9,937 — 1,756 Derivative assets 1,844 — 1,844 — Total assets $ 13,537 $ 9,937 $ 1,844 $ 1,756 Liabilities: Derivative liabilities $ 2,652 $ — $ 2,652 $ — Fair Value Measurements Using: As of December 31, 2022 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 24 $ 24 $ — $ — Investments—guaranteed income fund 1,853 — — 1,853 Investments—mutual funds and other 8,699 8,699 — — Total investments 10,576 8,723 — 1,853 Derivative assets 3,769 — 3,769 — Total assets $ 14,345 $ 8,723 $ 3,769 $ 1,853 Liabilities: Derivative liabilities $ 2,215 $ — $ 2,215 $ — The following table sets forth the summary of the changes in the fair value of Level 3 investments for the six months ended June 30, 2023 and 2022: Six months ended June 30, 2023 2022 (in thousands) Beginning Balance $ 1,853 $ 2,036 Purchases and adjustments — 132 Transfers — — Distribution (114) (83) Investment income 17 17 Ending Balance $ 1,756 $ 2,102 Investment income from the Level 3 investments is reflected in other income, net in the condensed consolidated statements of income. At June 30, 2023, 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 June 30, 2023, long-term debt, which includes current maturities but excludes debt issuance costs, had a carrying value of approximately $666.8 million, compared to the estimated fair value of $573.3 million. At December 31, 2022, long-term debt, which includes the current maturities but excludes debt issuance costs, had a carrying value of approximately $600.8 million, compared to a fair value of approximately $505.0 million. 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	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Our outstanding long-term debt is shown below: June 30, December 31, (in thousands) 2023 2022 Uncollateralized senior notes: 5.93% note, due October 31, 2023 $ 1,500 $ 3,000 5.68% note, due June 30, 2026 8,700 11,600 6.43% note, due May 2, 2028 3,500 4,200 3.73% note, due December 16, 2028 12,000 12,000 3.88% note, due May 15, 2029 30,000 35,000 3.25% note, due April 30, 2032 63,000 66,500 3.48% note, due May 31, 2038 50,000 50,000 3.58% note, due November 30, 2038 50,000 50,000 3.98% note, due August 20, 2039 100,000 100,000 2.98% note, due December 20, 2034 70,000 70,000 3.00% note, due July 15, 2035 50,000 50,000 2.96% note, due August 15, 2035 40,000 40,000 2.49% notes Due January 25, 2037 50,000 50,000 2.95% notes Due March 15, 2042 50,000 50,000 5.43% notes Due March 14, 2038 80,000 — Equipment security note 2.46% note, due September 24, 2031 8,078 8,517 Less: debt issuance costs (1,042) (946) Total long-term debt 665,736 599,871 Less: current maturities (19,994) (21,483) Total long-term debt, net of current maturities $ 645,742 $ 578,388 Note Purchase Agreements On March 14, 2023 we issued 5.43 percent Senior Notes due March 14, 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 credit facility 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, whom are under no obligation to purchase any unsecured debt. In February 2023, we amended our Shelf Agreements with Prudential and MetLife. The amended agreements expand the total borrowing capacity and extend the term of the agreements for an additional three years from the effective dates. The following table summarizes the current available capacity under our Shelf Agreements at June 30, 2023: (in thousands) Total Borrowing Capacity Less: Amount of Debt Issued Less: Unfunded Commitments Remaining Borrowing Capacity Shelf Agreements (1) Prudential Shelf Agreement $ 405,000 $ (300,000) $ — $ 105,000 MetLife Shelf Agreement 200,000 (50,000) — 150,000 Total Shelf Agreements as of June 30, 2023 $ 605,000 $ (350,000) $ — $ 255,000 (1) The Prudential and MetLife Shelf Agreements both expire in February 2026.

Short-Term Borrowings (Notes)

Short-Term Borrowings (Notes)	6 Months Ended
	Jun. 30, 2023
Short-Term Borrowing [Abstract]
Short-term Debt [Text Block]	15. Short-Term Borrowings We are authorized by our Board of Directors to borrow up to $400.0 million of short-term debt, as required. At June 30, 2023 and December 31, 2022, we had $95.8 million and $202.2 million, respectively, of short-term borrowings outstanding at a weighted average interest rate of 5.33 percent and 5.04 percent, respectively. In August 2022, we amended both tranches of our Revolver, which now bear interest using SOFR as the benchmark interest rate, plus a 10-basis point SOFR adjustment. In addition, the 364-day tranche was extended through August 2023. We expect to renew the 364-day tranche of the Revolver upon its current expiration. As part of these amendments, the parties agreed to eliminate the previous covenant capping the aggregate investments limit at $150.0 million where we maintain an ownership interest less than 50 percent. Additionally the 364-day tranche of the facility now offers a reduced interest margin similar to the five-year tranche for amounts borrowed in connection with new sustainable investments. All other terms and conditions remain unchanged. Borrowings outstanding under the sustainable investment sublimit of the 364-day tranche amounted to $9.4 million at June 30, 2023. The availability of funds under the Revolver is subject to conditions specified in the credit agreement, all of which we currently satisfy. These conditions include our compliance with financial covenants and the continued accuracy of representations and warranties contained in the Revolver's loan documents. We are required by the financial covenants in the Revolver to maintain, at the end of each fiscal year, a funded indebtedness ratio of no greater than 65 percent. As of June 30, 2023, we are in compliance with this covenant. The 364-day tranche of the Revolver expires in August 2023 and the five-year tranche expires in August 2026, both of which are available to fund our short-term cash needs to meet seasonal working capital requirements and to temporarily fund portions of our capital expenditures. Borrowings under both tranches of the Revolver are subject to a pricing grid, including the commitment fee and the interest rate charged based upon our total indebtedness to total capitalization ratio for the prior quarter. As of June 30, 2023, the pricing under the 364-day tranche of the Revolver included an unused commitment fee of 9 basis points and maintains an interest rate of 70 basis points over SOFR plus a 10 basis point SOFR adjustment. As of June 30, 2023, the pricing under the five-year tranche of the Revolver included an unused commitment fee of 9 basis points and an interest rate of 95 basis points over SOFR plus a 10 basis point SOFR adjustment. Our total available credit under the Revolver at June 30, 2023 was $298.3 million. As of June 30, 2023, we had issued $5.9 million in letters of credit to various counterparties under the Revolver. These letters of credit are not included in the outstanding short-term borrowings and we do not anticipate that they will be drawn upon by the counterparties. The letters of credit reduce the available borrowings under the Revolver. For additional information on interest rate swaps related to our short-term borrowings, see Note 12, Derivative Instruments

Leases Leases

Leases Leases	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023, 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 June 30, 2023, 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 consolidated statements of income: Three Months Ended Six Months Ended June 30, June 30, (in thousands) Classification 2023 2022 2023 2022 Operating lease cost (1) Operations expense $780 $726 $1,568 $1,377 (1) Includes short-term leases and variable lease costs, which are immaterial. The following table presents the balance and classifications of our right of use assets and lease liabilities included in our condensed consolidated balance sheet at June 30, 2023 and December 31, 2022: (in thousands) Balance sheet classification June 30, 2023 December 31, 2022 Assets Operating lease assets Operating lease right-of-use assets $ 13,432 $ 14,421 Liabilities Current Operating lease liabilities Other accrued liabilities $ 2,373 $ 2,552 Noncurrent Operating lease liabilities Operating lease - liabilities 11,585 12,392 Total lease liabilities $ 13,958 $ 14,944 The following table presents our weighted-average remaining lease terms and weighted-average discount rates for our operating leases at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Weighted-average remaining lease term ( in years ) Operating leases 8.37 8.54 Weighted-average discount rate Operating leases 3.5 % 3.4 % 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 June 30, 2023 and 2022: Six Months Ended June 30, (in thousands) 2023 2022 Operating cash flows from operating leases $ 1,465 $ 1,428 The following table presents the future undiscounted maturities of our operating and financing leases at June 30, 2023 and for each of the next five years and thereafter: (in thousands) Operating Leases (1) Remainder of 2023 $ 1,419 2024 2,629 2025 2,263 2026 1,734 2027 1,571 2028 1,192 Thereafter 5,243 Total lease payments 16,051 Less: Interest (2,093) Present value of lease liabilities $ 13,958 (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)	6 Months Ended
	Jun. 30, 2023
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, 2022. 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 changed 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)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands, except shares and per share data) Calculation of Basic Earnings Per Share: Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 Weighted average shares outstanding 17,794,320 17,730,833 17,777,203 17,704,592 Basic Earnings Per Share $ 0.91 $ 0.96 $ 2.95 $ 3.05 Calculation of Diluted Earnings Per Share: Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 Reconciliation of Denominator: Weighted shares outstanding—Basic 17,794,320 17,730,833 17,777,203 17,704,592 Effect of dilutive securities—Share-based compensation 57,704 79,038 64,751 81,037 Adjusted denominator—Diluted 17,852,024 17,809,871 17,841,954 17,785,629 Diluted Earnings Per Share $ 0.90 $ 0.96 $ 2.94 $ 3.04

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table displays our revenue by major source based on product and service type for the three months ended June 30, 2023 and 2022: Three Months Ended June 30, 2023 Three Months Ended June 30, 2022 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 14,109 $ — $ — $ 14,109 $ 13,086 $ — $ — $ 13,086 Florida natural gas distribution (1) 40,766 — — 40,766 35,436 — — 35,436 FPU electric distribution 23,034 — — 23,034 20,305 — — 20,305 Maryland natural gas division 4,622 — — 4,622 4,372 — — 4,372 Sandpiper natural gas/propane operations 4,079 — — 4,079 4,248 — — 4,248 Elkton Gas 1,303 — — 1,303 1,705 — — 1,705 Total energy distribution 87,913 — — 87,913 79,152 — — 79,152 Energy transmission Aspire Energy — 5,726 — 5,726 — 10,808 — 10,808 Aspire Energy Express 369 — — 369 369 — — 369 Eastern Shore 19,632 — — 19,632 18,875 — — 18,875 Peninsula Pipeline 7,593 — — 7,593 6,777 — — 6,777 Total energy transmission 27,594 5,726 — 33,320 26,021 10,808 — 36,829 Energy generation Eight Flags — 4,532 — 4,532 — 5,916 — 5,916 Propane operations Propane delivery operations — 27,315 — 27,315 — 34,469 — 34,469 Compressed Natural Gas Services Marlin Gas Services — 3,238 — 3,238 — 2,380 — 2,380 Other and eliminations Eliminations (14,366) (60) (6,344) (20,770) (12,980) (110) (6,271) (19,361) Other — — 45 45 — — 85 85 Total other and eliminations (14,366) (60) (6,299) (20,725) (12,980) (110) (6,186) (19,276) Total operating revenues (2) $ 101,141 $ 40,751 $ (6,299) $ 135,593 $ 92,193 $ 53,463 $ (6,186) $ 139,470 (1) In accordance with the Florida PSC approval of our natural gas base rate proceeding, effective March 1, 2023, our natural gas distribution businesses in Florida (FPU, FPU-Indiantown division, FPU-Fort Meade division and Chesapeake Utilities' CFG division, collectively, “Florida natural gas distribution businesses”) have been consolidated for rate-making purposes and amounts above are now being presented on a consolidated basis consistent with the final rate order. (2) Total operating revenues for the three months ended June 30, 2023 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 June 30, 2022. 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. The following table displays our revenue by major source based on product and service type for the six months ended June 30, 2023 and 2022: Six Months Ended June 30, 2023 Six Months Ended June 30, 2022 (in thousands) Regulated Energy Unregulated Energy Other and Eliminations Total Regulated Energy Unregulated Energy Other and Eliminations Total Energy distribution Delaware natural gas division $ 51,016 $ — $ — $ 51,016 $ 47,568 $ — $ — $ 47,568 Florida natural gas distribution (1) 87,124 — — 87,124 75,722 — — 75,722 FPU electric distribution 45,771 — — 45,771 39,394 — — 39,394 Maryland natural gas division 16,884 — — 16,884 14,836 — — 14,836 Sandpiper natural gas/propane operations 11,161 — — 11,161 11,885 — — 11,885 Elkton Gas 5,444 — — 5,444 5,071 — — 5,071 Total energy distribution 217,400 — — 217,400 194,476 — — 194,476 Energy transmission Aspire Energy — 19,680 — 19,680 — 28,844 — 28,844 Aspire Energy Express 733 — — 733 632 — — 632 Eastern Shore 40,302 — — 40,302 39,196 — — 39,196 Peninsula Pipeline 14,504 — — 14,504 13,549 — — 13,549 Total energy transmission 55,539 19,680 — 75,219 53,377 28,844 — 82,221 Energy generation Eight Flags — 9,832 — 9,832 — 11,455 — 11,455 Propane operations Propane delivery operations — 87,295 — 87,295 — 110,075 — 110,075 Compressed Natural Gas Services Marlin Gas Services — 7,238 — 7,238 — 4,589 — 4,589 Other and eliminations Eliminations (29,528) (129) (13,696) (43,353) (27,769) (207) (12,706) (40,682) Other — — 91 91 — — 216 216 Total other and eliminations (29,528) (129) (13,605) (43,262) (27,769) (207) (12,490) (40,466) Total operating revenues (2) $ 243,411 $ 123,916 $ (13,605) $ 353,722 $ 220,084 $ 154,756 $ (12,490) $ 362,350 (1) In accordance with the Florida PSC approval of our natural gas base rate proceeding, effective March 1, 2023, our natural gas distribution businesses in Florida (FPU, FPU-Indiantown division, FPU-Fort Meade division and Chesapeake Utilities' CFG division, collectively, “Florida natural gas distribution businesses”) have been consolidated for rate-making purposes and amounts above are now being presented on a consolidated basis consistent with the final rate order. (2) Total operating revenues for the six months ended June 30, 2023 include other revenue (revenues from sources other than contracts with customers) of $0.8 million and $0.2 million for our Regulated and Unregulated Energy segments, respectively and $0.1 million and $0.2 million for our Regulated and Unregulated Energy segments, respectively, for the six months ended June 30, 2022. 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 June 30, 2023 and December 31, 2022 were as follows: Trade Receivables Contract Assets (Current) Contract Assets (Non-current) Contract Liabilities (Current) (in thousands) Balance at 12/31/2022 $ 61,687 $ 18 $ 4,321 $ 983 Balance at 6/30/2023 41,140 18 3,787 594 Decrease $ (20,547) $ — $ (534) $ (389)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	Revenue for these businesses for the remaining performance obligations, at June 30, 2023, are expected to be recognized as follows: (in thousands) 2023 2024 2025 2026 2027 2028 2029 and thereafter Eastern Shore and Peninsula Pipeline $ 19,613 $ 37,006 $ 30,613 $ 27,138 $ 24,163 $ 23,398 $ 188,498 Natural gas distribution operations 3,967 7,744 7,297 7,066 6,470 5,154 28,371 FPU electric distribution 326 652 275 275 275 275 — Total revenue contracts with remaining performance obligations $ 23,906 $ 45,402 $ 38,185 $ 34,479 $ 30,908 $ 28,827 $ 216,869

Rates and Other Regulatory Ac_2

Rates and Other Regulatory Activities Rates and Regulatory Activities (Tables)	6 Months Ended
	Jun. 30, 2023
Rates and Regulatory Activities [Abstract]
Summary of Effects of Federal Tax Reform on Regulated Businesses [Table Text Block]	The following table summarizes the regulatory liabilities related to accumulated deferred taxes ("ADIT") associated with TCJA for our regulated businesses as of June 30, 2023 and December 31, 2022: Amount (in thousands) Operation and Regulatory Jurisdiction June 30, 2023 December 31, 2022 Status Eastern Shore (FERC) $34,190 $34,190 Will be addressed in Eastern Shore's next rate case filing. Chesapeake Delaware natural gas division (Delaware PSC) $12,134 $12,230 PSC approved amortization of ADIT in January 2019. Chesapeake Maryland natural gas division (Maryland PSC) $3,644 $3,703 PSC approved amortization of ADIT in May 2018. Sandpiper Energy (Maryland PSC) $3,542 $3,597 PSC approved amortization of ADIT in May 2018. Florida natural gas distribution (Florida PSC) (1) $26,894 $27,179 PSC issued order authorizing amortization and retention of net ADIT liability by the Company in February 2019. FPU electric division (Florida PSC) $4,876 $4,993 In January 2019, PSC issued order approving amortization of ADIT through purchased power cost recovery, storm reserve and rates. Elkton Gas (Maryland PSC) $1,043 $1,059 PSC approved amortization of ADIT in March 2018. (1) In accordance with the Florida PSC approval of our natural gas base rate proceeding, effective March 1, 2023, our natural gas distribution businesses in Florida have been consolidated for rate-making purposes and amounts above are now being presented on a consolidated basis consistent with the final rate order.

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment	The following table presents financial information about our reportable segments: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands) Operating Revenues, Unaffiliated Customers Regulated Energy $ 100,657 $ 91,830 $ 242,279 $ 215,888 Unregulated Energy 34,936 47,640 111,443 146,462 Total operating revenues, unaffiliated customers $ 135,593 $ 139,470 $ 353,722 $ 362,350 Intersegment Revenues (1) Regulated Energy $ 484 $ 363 $ 1,132 $ 4,196 Unregulated Energy 5,816 5,823 12,473 7,819 Other businesses 45 85 91 691 Total intersegment revenues $ 6,345 $ 6,271 $ 13,696 $ 12,706 Operating Income Regulated Energy $ 29,291 $ 25,841 $ 66,916 $ 60,539 Unregulated Energy (993) 560 16,252 20,613 Other businesses and eliminations 48 68 93 182 Operating income 28,346 26,469 83,261 81,334 Other income, net 831 2,584 1,107 3,498 Interest charges 6,964 5,825 14,196 11,164 Income Before Income Taxes 22,213 23,228 70,172 73,668 Income Taxes 6,080 6,177 17,695 19,683 Net Income $ 16,133 $ 17,051 $ 52,477 $ 53,985 (1) All significant intersegment revenues are billed at market rates and have been eliminated from consolidated operating revenues. (in thousands) June 30, 2023 December 31, 2022 Identifiable Assets Regulated Energy segment $ 1,707,605 $ 1,716,255 Unregulated Energy segment 448,217 463,239 Other businesses and eliminations 48,668 35,543 Total Identifiable Assets $ 2,204,490 $ 2,215,037

Stockholder's Equity - Accumu_2

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss	Defined Benefit Commodity Interest Rate Pension and Contracts Swap Postretirement Cash Flow Cash Flow Plan Items Hedges Hedges Total (in thousands) As of December 31, 2022 $ (2,506) $ 1,092 $ 35 $ (1,379) Other comprehensive income (loss) before reclassifications — (2,045) 612 (1,433) Amounts reclassified from accumulated other comprehensive income (loss) 21 (126) (142) (247) Net current-period other comprehensive income (loss) 21 (2,171) 470 (1,680) As of June 30, 2023 $ (2,485) $ (1,079) $ 505 $ (3,059) As of December 31, 2021 $ (3,268) $ 4,571 $ — $ 1,303 Other comprehensive income before reclassifications — 2,206 — 2,206 Amounts reclassified from accumulated other comprehensive income (loss) 35 (2,174) — (2,139) Net prior-period other comprehensive income 35 32 — 67 As of June 30, 2022 $ (3,233) $ 4,603 $ — $ 1,370

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2023
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic benefit costs for the FPU Pension Plan for the three and six months ended June 30, 2023 and 2022 is set forth in the following table: Three Months Ended Six Months Ended June 30, June 30, FPU Pension Plan 2023 2022 2023 2022 (in thousands) Interest cost $ 633 $ 449 $ 1,266 $ 898 Expected return on plan assets (668) (857) (1,336) (1,714) Amortization of net (gain) loss 110 124 220 248 Total periodic cost (benefit) $ 75 $ (284) $ 150 $ (568)
Amounts Included in Regulatory asset and AOCI [Table Text Block]	The following table presents the amounts included in the regulatory asset and accumulated other comprehensive income (loss) that were recognized as components of the FPU Pension Plan's net periodic benefit cost during the three and six months ended June 30, 2023 and 2022: Three Months Ended Six Months Ended June 30, June 30, FPU Pension Plan 2023 2022 2023 2022 (in thousands) Recognized from accumulated other comprehensive (income) loss (1) $ 21 $ 24 $ 42 $ 48 Recognized from regulatory asset 89 100 178 200 Total net loss in net periodic benefit cost $ 110 $ 124 $ 220 $ 248 (1) See Note 9 , Stockholders' Equity .

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2023
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 six months ended June 30, 2023 and 2022: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in thousands) Awards to key employees $ 284 $ 1,122 $ 2,440 $ 3,101 Awards to non-employee directors 227 220 479 454 Total compensation expense 511 1,342 2,919 3,555 Less: tax benefit (132) (346) (754) (917) Share-based compensation amounts included in net income $ 379 $ 996 $ 2,165 $ 2,638
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 six months ended June 30, 2023: Number of Shares Weighted Average Outstanding—December 31, 2022 204,149 $ 103.17 Granted 80,752 $ 128.01 Vested (68,302) $ 91.59 Expired (2,053) $ 94.64 Outstanding—June 30, 2023 214,546 $ 116.04

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments [Table Text Block]	As of June 30, 2023, 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 21.3 Cash flow hedges June 2026 Sharp Propane (gallons) Sales 3.2 Cash flow hedges December 2023
Fair Values of Derivative Contracts Recorded in Condensed Consolidated Balance Sheet	June 30, 2023 and December 31, 2022, are as follows: Derivative Assets Fair Value As Of (in thousands) Balance Sheet Location June 30, 2023 December 31, 2022 Derivatives designated as cash flow hedges Propane swap agreements Derivative assets, at fair value $ 1,068 $ 3,317 Interest rate swap agreements Derivative assets, at fair value 776 452 Total Derivative Assets (1) $ 1,844 $ 3,769 (1) Derivative assets, at fair value include $1.7 million and $2.8 million in current assets in the condensed consolidated balance sheet at June 30, 2023 and December 31, 2022, respectively, with the remainder of the balance classified as long-term. Derivative Liabilities Fair Value As Of (in thousands) Balance Sheet Location June 30, 2023 December 31, 2022 Derivatives designated as cash flow hedges Propane swap agreements Derivative liabilities, at fair value $ 2,556 $ 1,810 Interest rate swap agreements Derivative liabilities, at fair value 96 405 Total Derivative Liabilities (1) $ 2,652 $ 2,215 (1) Derivative liabilities, at fair value include $2.2 million and $0.6 million in current liabilities in the condensed consolidated balance sheet at June 30, 2023 and December 31, 2022, respectively, with the remainder of the balance 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 financial statements are as follows: Amount of Gain (Loss) on Derivatives Location of Gain For the Three Months Ended June 30, For the Six Months Ended June 30, (in thousands) (Loss) on Derivatives 2023 2022 2023 2022 Derivatives not designated as hedging instruments Propane swap agreements Unregulated propane and natural gas costs $ — $ — $ — $ 56 Derivatives designated as cash flow hedges Propane swap agreements Revenues — — 733 (826) Propane swap agreements Unregulated propane and natural gas costs (432) 283 (559) 3,830 Propane swap agreements Other comprehensive income (loss) (2,417) (686) (2,994) 28 Interest rate swap agreements Interest expense 127 — 192 — Interest rate swap agreements Other comprehensive income (loss) 898 — 633 — Total $ (1,824) $ (403) $ (1,995) $ 3,088

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 and December 31, 2022: Fair Value Measurements Using: As of June 30, 2023 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 23 $ 23 $ — $ — Investments—guaranteed income fund 1,756 — — 1,756 Investments—mutual funds and other 9,914 9,914 — — Total investments 11,693 9,937 — 1,756 Derivative assets 1,844 — 1,844 — Total assets $ 13,537 $ 9,937 $ 1,844 $ 1,756 Liabilities: Derivative liabilities $ 2,652 $ — $ 2,652 $ — Fair Value Measurements Using: As of December 31, 2022 Fair Value Quoted Prices in Significant Other Significant (in thousands) Assets: Investments—equity securities $ 24 $ 24 $ — $ — Investments—guaranteed income fund 1,853 — — 1,853 Investments—mutual funds and other 8,699 8,699 — — Total investments 10,576 8,723 — 1,853 Derivative assets 3,769 — 3,769 — Total assets $ 14,345 $ 8,723 $ 3,769 $ 1,853 Liabilities: Derivative liabilities $ 2,215 $ — $ 2,215 $ —
Summary of Changes in Fair Value of Investments	The following table sets forth the summary of the changes in the fair value of Level 3 investments for the six months ended June 30, 2023 and 2022: Six months ended June 30, 2023 2022 (in thousands) Beginning Balance $ 1,853 $ 2,036 Purchases and adjustments — 132 Transfers — — Distribution (114) (83) Investment income 17 17 Ending Balance $ 1,756 $ 2,102

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Outstanding Long-Term Debt	Our outstanding long-term debt is shown below: June 30, December 31, (in thousands) 2023 2022 Uncollateralized senior notes: 5.93% note, due October 31, 2023 $ 1,500 $ 3,000 5.68% note, due June 30, 2026 8,700 11,600 6.43% note, due May 2, 2028 3,500 4,200 3.73% note, due December 16, 2028 12,000 12,000 3.88% note, due May 15, 2029 30,000 35,000 3.25% note, due April 30, 2032 63,000 66,500 3.48% note, due May 31, 2038 50,000 50,000 3.58% note, due November 30, 2038 50,000 50,000 3.98% note, due August 20, 2039 100,000 100,000 2.98% note, due December 20, 2034 70,000 70,000 3.00% note, due July 15, 2035 50,000 50,000 2.96% note, due August 15, 2035 40,000 40,000 2.49% notes Due January 25, 2037 50,000 50,000 2.95% notes Due March 15, 2042 50,000 50,000 5.43% notes Due March 14, 2038 80,000 — Equipment security note 2.46% note, due September 24, 2031 8,078 8,517 Less: debt issuance costs (1,042) (946) Total long-term debt 665,736 599,871 Less: current maturities (19,994) (21,483) Total long-term debt, net of current maturities $ 645,742 $ 578,388
Schedule of Line of Credit Facilities [Line Items]
Schedule of Line of Credit Facilities [Table Text Block]	(in thousands) Total Borrowing Capacity Less: Amount of Debt Issued Less: Unfunded Commitments Remaining Borrowing Capacity Shelf Agreements (1) Prudential Shelf Agreement $ 405,000 $ (300,000) $ — $ 105,000 MetLife Shelf Agreement 200,000 (50,000) — 150,000 Total Shelf Agreements as of June 30, 2023 $ 605,000 $ (350,000) $ — $ 255,000

Leases Leases (Tables)

Leases Leases (Tables)	6 Months Ended
	Jun. 30, 2023
Lease Disclosure [Abstract]
Lease, Cost [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, (in thousands) Classification 2023 2022 2023 2022 Operating lease cost (1) Operations expense $780 $726 $1,568 $1,377
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 sheet at June 30, 2023 and December 31, 2022: (in thousands) Balance sheet classification June 30, 2023 December 31, 2022 Assets Operating lease assets Operating lease right-of-use assets $ 13,432 $ 14,421 Liabilities Current Operating lease liabilities Other accrued liabilities $ 2,373 $ 2,552 Noncurrent Operating lease liabilities Operating lease - liabilities 11,585 12,392 Total lease liabilities $ 13,958 $ 14,944
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 June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Weighted-average remaining lease term ( in years ) Operating leases 8.37 8.54 Weighted-average discount rate Operating leases 3.5 % 3.4 %
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 June 30, 2023 and 2022: Six Months Ended June 30, (in thousands) 2023 2022 Operating cash flows from operating leases $ 1,465 $ 1,428
Schedule of Maturities of Leases [Table Text Block]	The following table presents the future undiscounted maturities of our operating and financing leases at June 30, 2023 and for each of the next five years and thereafter: (in thousands) Operating Leases (1) Remainder of 2023 $ 1,419 2024 2,629 2025 2,263 2026 1,734 2027 1,571 2028 1,192 Thereafter 5,243 Total lease payments 16,051 Less: Interest (2,093) Present value of lease liabilities $ 13,958 (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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.91	$ 0.96	$ 2.95	$ 3.05
Calculation of Basic Earnings Per Share:
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Weighted shares outstanding (shares)	17,794,320	17,730,833	17,777,203	17,704,592
Basic Earnings Per Share (in dollars per share)	$ 0.91	$ 0.96	$ 2.95	$ 3.05
Reconciliation of Numerator:
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Reconciliation of Denominator:
Weighted shares outstanding - Basic (shares)	17,794,320	17,730,833	17,777,203	17,704,592
Effect of dilutive securities:
Share-based compensation (shares)	57,704	79,038	64,751	81,037
Adjusted denominator-Diluted (shares)	17,852,024	17,809,871	17,841,954	17,785,629
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.90	$ 0.96	$ 2.94	$ 3.04
Diluted Earnings Per Share (in dollars per share)	$ 0.90	$ 0.96	$ 2.94	$ 3.04
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Basic (shares)	17,794,320	17,730,833	17,777,203	17,704,592
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.91	$ 0.96	$ 2.95	$ 3.05
Basic (in dollars per share)	$ 0.91	$ 0.96	$ 2.95	$ 3.05
Share-based compensation (shares)	57,704	79,038	64,751	81,037
Diluted (shares)	17,852,024	17,809,871	17,841,954	17,785,629
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.90	$ 0.96	$ 2.94	$ 3.04
Diluted (in dollars per share)	$ 0.90	$ 0.96	$ 2.94	$ 3.04
Retained Earnings [Member]
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Calculation of Basic Earnings Per Share:
Net Income	16,133	17,051	52,477	53,985
Reconciliation of Numerator:
Net Income	16,133	17,051	52,477	53,985
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	16,133	17,051	52,477	53,985
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985

Acquisitions and Divestitures_2

Acquisitions and Divestitures (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 135,593	$ 139,470	$ 353,722	$ 362,350
Operating Income (Loss)	28,346	26,469	83,261	81,334
Unregulated Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Income (Loss)	(993)	$ 560	16,252	$ 20,613
Davenport Energy
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	1,500		$ 1,500
Number of customers acquired through acquisition			850
Business Combination, Consideration Transferred			$ 2,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	500		$ 500
Gallons acquired through acquisition			400,000
Planet Found
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	4,000		$ 4,000
Business Combination, Consideration Transferred			9,500
Business Combination, Working Capital	100		100
Business Combination, Contingent Consideration, Liability	900		900
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	1,100		1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 4,400		$ 4,400
Planet Found | Unregulated Energy [Member]
Acquisitions - Additional Information [Line Items]
Tons of Poultry Litter			1,200

Revenue Recognition Additional

Revenue Recognition Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 0.2	$ 0.3	$ 0.4	$ 0.7

Revenue Recognition Disegragati

Revenue Recognition Disegragation of Revenue (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 135,593,000		$ 139,470,000		$ 353,722,000	$ 362,350,000
Revenue from Contract with Customer, Excluding Assessed Tax	135,593,000	[1]	139,470,000	[1]	353,722,000	362,350,000
Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	101,141,000	[1]	92,193,000	[1]	243,411,000	220,084,000
Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	40,751,000	[1]	53,463,000	[1]	123,916,000	154,756,000
Other Segments And Intersegments Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,299,000)		(6,186,000)		(13,605,000)	(12,490,000)
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,299,000)	[1]	(6,186,000)	[1]	(13,605,000)	(12,490,000)
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(20,725,000)		(19,276,000)		(43,262,000)	(40,466,000)
Eliminations [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(14,366,000)		(12,980,000)		(29,528,000)	(27,769,000)
Other [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues	200,000		(100,000)		800,000	100,000
Other [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues	100,000		100,000		200,000	200,000
Revenue from Contract with Customer, Excluding Assessed Tax	(60,000)		(110,000)		(129,000)	(207,000)
Energy Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	87,913,000		79,152,000		217,400,000	194,476,000
Energy Distribution [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	87,913,000		79,152,000		217,400,000	194,476,000
Energy Distribution [Member] | Delaware natural gas division [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	14,109,000		13,086,000		51,016,000	47,568,000
Energy Distribution [Member] | Delaware natural gas division [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	14,109,000		13,086,000		51,016,000	47,568,000
Energy Distribution [Member] | FPU Electric Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	23,034,000		20,305,000		45,771,000	39,394,000
Energy Distribution [Member] | FPU Electric Distribution [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	23,034,000		20,305,000		45,771,000	39,394,000
Energy Distribution [Member] | Florida Public Utilities Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	40,766,000		35,436,000		87,124,000	75,722,000
Energy Distribution [Member] | Florida Public Utilities Company [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	40,766,000		35,436,000		87,124,000	75,722,000
Energy Distribution [Member] | Maryland Natural Gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,622,000		4,372,000		16,884,000	14,836,000
Energy Distribution [Member] | Maryland Natural Gas [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,622,000		4,372,000		16,884,000	14,836,000
Energy Distribution [Member] | Sandpiper [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,079,000		4,248,000		11,161,000	11,885,000
Energy Distribution [Member] | Sandpiper [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,079,000		4,248,000		11,161,000	11,885,000
Energy Distribution [Member] | Elkton Gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,303,000				5,444,000
Energy Distribution [Member] | Elkton Gas [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,303,000		1,705,000		5,444,000	5,071,000
Energy Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	33,320,000		36,829,000		75,219,000	82,221,000
Energy Transmission [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27,594,000		26,021,000		55,539,000	53,377,000
Energy Transmission [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,726,000		10,808,000		19,680,000	28,844,000
Energy Transmission [Member] | Aspire [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,726,000		10,808,000		19,680,000	28,844,000
Energy Transmission [Member] | Aspire [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,726,000		10,808,000		19,680,000	28,844,000
Energy Transmission [Member] | Eastern Shore Gas Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19,632,000		18,875,000		40,302,000	39,196,000
Energy Transmission [Member] | Eastern Shore Gas Company [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19,632,000		18,875,000		40,302,000	39,196,000
Energy Transmission [Member] | Peninsula Pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7,593,000		6,777,000		14,504,000	13,549,000
Energy Transmission [Member] | Peninsula Pipeline [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7,593,000		6,777,000		14,504,000	13,549,000
Energy Transmission [Member] | Aspire Energy Express | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	369,000		369,000		733,000	632,000
Energy Generation [Member] | Eight Flags [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,532,000		5,916,000		9,832,000	11,455,000
Energy Generation [Member] | Eight Flags [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,532,000		5,916,000		9,832,000	11,455,000
Propane Delivery [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27,315,000		34,469,000		87,295,000	110,075,000
Propane Delivery [Member] | Florida Propane | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27,315,000		34,469,000		87,295,000	110,075,000
Energy Services [Member] | Marlin Gas Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,238,000				7,238,000
Energy Services [Member] | Marlin Gas Services [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,238,000		2,380,000		7,238,000	4,589,000
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(20,770,000)		(19,361,000)		(43,353,000)	(40,682,000)
Eliminations [Member] | Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(14,366,000)		(12,980,000)		(29,528,000)	(27,769,000)
Eliminations [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(60,000)		(110,000)		(129,000)	(207,000)
Eliminations [Member] | Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(6,344,000)		(6,271,000)		(13,696,000)	(12,706,000)
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	45,000		85,000		91,000	216,000
Other [Member] | Unregulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0		0	0
Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 45,000		$ 85,000		$ 91,000	$ 216,000
[1]2) Total operating revenues for the three months ended June 30, 2023 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 June 30, 2022. 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.

Revenue Recognition Contract Ba

Revenue Recognition Contract Balances with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Receivables from Customers	$ 41,140		$ 41,140		$ 61,687
Contract with Customer, Asset, Net, Current	18		18		18
Contract with Customer, Asset, Net, Noncurrent	3,787		3,787		4,321
Customer deposits and refunds	594		594		$ 983
Increase (Decrease) in Receivables			(20,547)
Increase (Decrease) in Other Current Assets			0
Increase (Decrease) in Other Noncurrent Assets			(534)
Increase (Decrease) in Other Current Liabilities			(389)
Contract with Customer, Liability, Revenue Recognized	$ 200	$ 300	$ 400	$ 700

Revenue Recognition Remaining P

Revenue Recognition Remaining Performance Obligations (Details) $ in Thousands	Jun. 30, 2023 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]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 326
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	652
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	275
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	275
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	275
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	275
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
Natural gas distribution operations [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	3,967
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	7,744
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	7,297
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	7,066
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	6,470
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	5,154
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	28,371
Eastern Shore and Peninsula Pipeline [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	19,613
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	37,006
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	30,613
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	27,138
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	24,163
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	23,398
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	188,498
Total for Segments [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	23,906
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	45,402
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	38,185
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	34,479
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	30,908
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	28,827
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	$ 216,869

Rates and Other Regulatory Ac_3

Rates and Other Regulatory Activities - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) Dekatherm mi	Dec. 31, 2022 USD ($)
Rates and Other Regulatory Activities [Line Items]
COVID-19 Regulatory Asset	$ 700	$ 1,200
Interim Rates	7,700
Permanent Rates	24,100
Annual Rate Case Recovery	17,200
Florida Public Utilities Company [Member]
Rates and Other Regulatory Activities [Line Items]
COVID-19 Settlement Amount	2,100
Delaware natural gas division [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	12,134	12,230
Maryland Division [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	3,644	3,703
Sandpiper [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	3,542	3,597
Florida Public Utilities Company [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	26,894	27,179
FPU electric division [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	4,876	4,993
Eastern Shore Gas Company [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	34,190	34,190
Elkton Gas [Member]
Rates and Other Regulatory Activities [Line Items]
Regulatory Liabilities	$ 1,043	$ 1,059
Beachside Expansion | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Number of Mainline Pipeline Miles | mi	11.3
Additional Firm Natural Gas Transportation Deliverability | Dekatherm	10,176
Twin Lakes Expansion | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm	2,400
Lake Wales Pipeline Acquisition | Peninsula Pipeline Company [Member]
Rates and Other Regulatory Activities [Line Items]
Additional Firm Natural Gas Transportation Deliverability | Dekatherm	9,000

Environmental Commitments and_2

Environmental Commitments and Contingencies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2023 USD ($) site	Dec. 31, 2022 USD ($)
Environmental Commitments And Contingencies [Line Items]
Company's exposure in number of former Manufactured Gas Plant Sites | site	7
Environmental liabilities	$ 2,512,000	$ 3,272,000
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	900,000
Manufactured Gas Plant [Member]
Environmental Commitments And Contingencies [Line Items]
Regulatory Assets for future recovery of environmental costs	500,000	800,000
FPU [Member]
Environmental Commitments And Contingencies [Line Items]
Environmental liabilities	3,400,000	$ 4,300,000
Approval of recovery of environmental costs	$ 14,000,000

Other Commitments and Conting_2

Other Commitments and Contingencies - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2023 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
Ratio based on average number of prior quarters	6
Ratios based on average of the prior quarters	1 year 6 months
Funds from operations interest coverage ratio minimum times	2
Total debt to capital maximum	0.65
Number Of Years For Power Purchase Agreement	20 years
Contract Duration	20 years
Aggregate guaranteed amount	$ 20
Guarantor Obligations, Current Carrying Value	14.2
Draws on letters of credit	5.9
Specific Purpose
Other Commitments [Line Items]
Guarantor Obligations, Current Carrying Value	$ 4
Florida Natural Gas Distribution and Eight Flags [Member]
Other Commitments [Line Items]
Number of Years for Asset Management Agreement	10 years
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				6 Months Ended
	Jun. 30, 2023 USD ($)		Jun. 30, 2022 USD ($)		Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments					2
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	$ 135,593		$ 139,470		$ 353,722	$ 362,350
Operating Income
Total operating income	28,346		26,469		83,261	81,334
Other expense, net	831		2,584		1,107	3,498
Interest	6,964		5,825		14,196	11,164
Income Before Income Taxes	22,213		23,228		70,172	73,668
Income Taxes	6,080		6,177		17,695	19,683
Net Income	16,133		17,051		52,477	53,985
Identifiable Assets
Total identifiable assets	2,204,490				2,204,490		$ 2,215,037
Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	6,345		6,271		13,696	12,706
Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	135,593		139,470		353,722	362,350
Regulated Energy [Member]
Operating Income
Total operating income	29,291		25,841		66,916	60,539
Identifiable Assets
Total identifiable assets	1,707,605				1,707,605		1,716,255
Regulated Energy [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	484	[1]	363	[1]	1,132	4,196
Regulated Energy [Member] | Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	100,657		91,830		242,279	215,888
Unregulated Energy [Member]
Operating Income
Total operating income	(993)		560		16,252	20,613
Identifiable Assets
Total identifiable assets	448,217				448,217		463,239
Unregulated Energy [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	5,816	[1]	5,823	[1]	12,473	7,819
Unregulated Energy [Member] | Operating Revenues, Unaffiliated Customers [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	34,936		47,640		111,443	146,462
Other [Member]
Identifiable Assets
Total identifiable assets	48,668				48,668		$ 35,543
Other [Member] | Intersegment Eliminations [Member]
Operating Revenues, Unaffiliated Customers
Total operating revenues, unaffiliated customers	45	[1]	85	[1]	91	691
Other and eliminations [Member]
Operating Income
Total operating income	48		68		93	182
Retained Earnings [Member]
Operating Income
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	16,133		17,051		52,477	53,985
Net Income	$ 16,133		$ 17,051		$ 52,477	$ 53,985
[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 Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ (1,379,000)		$ (1,379,000)	$ 1,303,000
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(1,433,000)	2,206,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				(247,000)	(2,139,000)
Net current-period other comprehensive income (loss)	$ (1,076,000)		$ (480,000)	(1,680,000)	67,000
Ending balance	(3,059,000)		1,370,000	(3,059,000)	1,370,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan		0.1
Stock Issued During Period, Value, Dividend Reinvestment Plan		$ 136.26
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan		$ 4,500,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan		0.1
Stock Issued During Period, Value, Dividend Reinvestment Plan		$ 136.26
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan		4,500,000
Maximum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from Stock Plans				75,000,000
Proceeds from Stock Plans				75,000,000
UnrealizedGainsLossesFromDefinedBenefitPensionAndPostretirementPlanItems [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(2,506,000)		(2,506,000)	(3,268,000)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				21,000	35,000
Net current-period other comprehensive income (loss)				21,000	35,000
Ending balance	(2,485,000)		(3,233,000)	(2,485,000)	(3,233,000)
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		1,092,000		1,092,000	4,571,000
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2,065,000)		(293,000)	(2,045,000)	2,206,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	313,000		(205,000)	(126,000)	(2,174,000)
Net current-period other comprehensive income (loss)				(2,171,000)	32,000
Ending balance	(1,079,000)		4,603,000	(1,079,000)	4,603,000
Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ 35,000		35,000	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	758,000		0	612,000	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				(142,000)	0
Net current-period other comprehensive income (loss)				470,000	0
Ending balance	$ 505,000		$ 0	$ 505,000	$ 0

Stockholder's Equity - Accumu_4

Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) - Reclassifications of Accumulated Other Comprehensive Loss (Detail) - USD ($) shares in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Amortization of pension and postretirement items:
Tax benefit	$ (6,080,000)		$ (6,177,000)	$ (17,695,000)	$ (19,683,000)
Derivative, Gain (Loss) on Derivative, Net	(1,824,000)		(403,000)	(1,995,000)	3,088,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan		0.1
Stock Issued During Period, Value, Dividend Reinvestment Plan		$ 136.26
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan		$ 4,500,000
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	$ 127,000		$ 0	$ 192,000	$ 0

Employee Benefit Plans (Detail)

Employee Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 400		$ 400
Rabbi Trust Investments Assets	11,700		11,700		$ 10,600
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	633	$ 449	1,266	$ 898
Expected return on plan assets	(668)	(857)	(1,336)	(1,714)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	110	124	220	248
Total periodic cost	75	(284)	150	(568)
Defined Benefit Plan Amounts Recognized Gain (Loss)	110		220
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	21	24	42	48
Defined Benefit Plan Amounts Recognized From Regulatory Asset	89	$ 100	$ 178	200
Chesapeake Pension SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Amounts Recognized Gain (Loss)	$ 124			$ 248

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 400		$ 400
Investments, at fair value	11,693		11,693		$ 10,576
Deferred compensation obligation	9,001		9,001		7,060
Rabbi Trust Investments Assets	11,700		11,700		$ 10,600
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	110	$ 124	220	$ 248
Defined Benefit Plan Amounts Recognized Gain (Loss)	110		220
Recognized from accumulated other comprehensive loss	21	24	42	48
Recognized from regulatory asset	89	$ 100	178	200
Chesapeake Pension SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Amounts Recognized Gain (Loss)	124			$ 248
Defined Benefit Plan, Plan Assets, Benefits Paid	$ 200		$ 300

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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
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)	$ 110	$ 124	$ 220	$ 248
Recognized from accumulated other comprehensive loss	21	24	42	48
Recognized from regulatory asset	89	$ 100	178	200
Total recognized in net periodic benefit cost	110		$ 220
Chesapeake Pension SERP [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total recognized in net periodic benefit cost	$ 124			$ 248

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		6 Months Ended		11 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 511	$ 1,342	$ 2,919	$ 3,555
Less: tax benefit	(132)	(346)	(754)	(917)
Share-Based Compensation amounts included in net income	379	996	$ 2,165	2,638
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					765
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 124.12
Total compensation expense	$ 227	220	$ 479	454
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	214,546		214,546			204,149
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			80,752
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			68,302
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period			(2,053)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 116.04		$ 116.04			$ 103.17
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			128.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value			91.59
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expirations Weighted Average Grant Date Fair Value			$ 94.64
Total compensation expense	$ 284	$ 1,122	$ 2,440	$ 3,101

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Stock Activity under the SICP (Detail) - $ / shares	6 Months Ended	11 Months Ended
	Jun. 30, 2023	Mar. 31, 2023
Award to key employees [Member]
Number of Shares
Outstanding - December 31, 2020 (shares)	204,149
Granted awards (shares)	80,752
Vested (shares)	(68,302)
Expired (shares)	2,053
Outstanding - June 30, 2021 (shares)	214,546
Weighted Average Fair Value
Outstanding - December 31, 2020 (in dollars per share)	$ 103.17
Granted (in dollars per share)	128.01
Vested (in dollars per share)	91.59
Expired (in dollars per share)	94.64
Outstanding - June 30, 2021 (in dollars per share)	116.04
Awards to non-employee directors [Member]
Number of Shares
Granted awards (shares)		765
Weighted Average Fair Value
Granted (in dollars per share)	$ 124.12

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		11 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	19,859	21,832
Payment, Tax Withholding, Share-based Payment Arrangement	$ 2,455	$ 2,838
Unrecognized compensation cost	$ 8,700
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	$ 124.12
Granted awards (shares)			765
Unrecognized compensation expense related to the awards to non-employee directors	$ 800
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	$ 124.12
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			765
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	(2,053)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 128.01
Granted awards (shares)	80,752
Vesting period	3 years
Payment, Tax Withholding, Share-based Payment Arrangement	$ 2,500
Intrinsic value of the SICP awards	$ 25,500
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	$ 128.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	80,752
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	19,859

Derivative Instruments Volume o

Derivative Instruments Volume of Derivative Activity (Details) - Sharp Energy Inc [Member] gal in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) gal
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $	$ (1.1)
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer	12 months
Swap Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	21.3
Swap Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	3.2

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2021	Sep. 30, 2021	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Energy Marketing Contracts Assets, Current			$ 1,704	$ 2,787
Energy Marketing Contract Liabilities, Current			(2,178)	(585)
Notional Amount of Nonderivative Instruments	$ 40,000	$ 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			776	452
Designated as Hedging Instrument [Member] | Mark To Market Energy Assets [Member] | Propane Swap Agreement [Member]
Derivative [Line Items]
Energy Marketing Contracts Assets, Current			1,068	3,317
Designated as Hedging Instrument [Member] | Mark-to-market energy liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current			(96)	(405)
Designated as Hedging Instrument [Member] | Mark-to-market energy liabilities [Member] | Propane Swap Agreement [Member]
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current			(2,556)	(1,810)
Sharp Energy Inc [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ (1,100)
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			$ 1,400	$ 100
Interest Rate Swap Rate, High Range [Member]
Derivative [Line Items]
Fixed Swap Rate			3.98%	0.17%	0.205%
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	Jun. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Energy Marketing Contracts Assets, Current	$ 1,704	$ 2,787
Energy Marketing Contract Liabilities, Current	2,178	585
Energy Marketing Contract Liabilities, Total	2,652	2,215
Energy Marketing Contracts Assets, Total	1,844	3,769
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	1,068	3,317
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	776	452
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	2,556	1,810
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	$ 96	$ 405

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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (1,824)	$ (403)	$ (1,995)	$ 3,088
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	(432)	283	(559)	3,830
Cost of Sales [Member] | Not Designated as Hedging Instrument [Member] | Propane Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0	56
Other Comprehensive Income (Loss) [Member] | Derivatives designated as hedging instrument [Member] | Propane Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(2,417)	(686)	(2,994)	28
Other Comprehensive Income (Loss) [Member] | Derivatives designated as hedging instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	898	0	633	0
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	127	0	192	0
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	$ 733	$ (826)

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	Jun. 30, 2023	Dec. 31, 2022
Assets:
Investments	$ 11,693	$ 10,576
Energy Marketing Contracts Assets, Current	1,704	2,787
Liabilities:
Energy Marketing Contract Liabilities, Current	2,178	585
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Assets, Fair Value Disclosure	9,937	8,723
Quoted Prices in Active Markets (Level 1) [Member] | Equity Securities [Member]
Assets:
Investments	23	24
Quoted Prices in Active Markets (Level 1) [Member] | Investments - Mutual funds and other [Member]
Assets:
Investments	9,914	8,699
Quoted Prices in Active Markets (Level 1) [Member] | Total Investments [Member]
Assets:
Investments	9,937	8,723
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, Fair Value Disclosure	1,844	3,769
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, Fair Value Disclosure	1,756	1,853
Significant Unobservable Inputs (Level 3) [Member] | Investments in guaranteed income fund [Member]
Assets:
Investments	1,756	1,853
Significant Unobservable Inputs (Level 3) [Member] | Total Investments [Member]
Assets:
Investments	1,756	1,853
Recurring [Member]
Assets:
Assets, Fair Value Disclosure	13,537	14,345
Liabilities:
Energy Marketing Contract Liabilities, Current		2,215
Recurring [Member] | Equity Securities [Member]
Assets:
Investments	23	24
Recurring [Member] | Investments in guaranteed income fund [Member]
Assets:
Investments	1,756	1,853
Recurring [Member] | Investments - Mutual funds and other [Member]
Assets:
Investments		8,699
Recurring [Member] | Total Investments [Member]
Assets:
Investments	11,693	10,576
Recurring [Member] | Mark To Market Energy Assets incl. natural gas and swap agreements[Member]
Assets:
Derivative assets	$ 1,844	$ 3,769

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Changes in Fair Value of Investments (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value	$ 11,693		$ 10,576
Energy Marketing Contract Liabilities, Current	2,178		585
Energy Marketing Contract Liabilities, Total	2,652		2,215
Energy Marketing Contracts Assets, Total	1,844		3,769
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(114)	$ (83)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,853	2,036
Purchases and adjustments	0	132
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	0
Investment Income	17	17
Ending Balance	1,756	$ 2,102
Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure	9,937		8,723
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure	1,844		3,769
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure	1,756		1,853
Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, Fair Value Disclosure	13,537		14,345
Energy Marketing Contract Liabilities, Current			2,215
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		24
Equity Securities [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value	23		24
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	1,756		1,853
Investments in guaranteed income fund [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value	1,756		1,853
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	9,914		8,699
Investments - Mutual funds and other [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value			8,699
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	9,937		8,723
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	1,756		1,853
Total Investments [Member] | Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments, at fair value	11,693		10,576
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	$ 1,844		$ 3,769

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Long-term debt including current maturities	$ 666.8	$ 600.8
Fair value of long-term debt	$ 573.3	$ 505

Long-Term Debt - Outstanding Lo

Long-Term Debt - Outstanding Long-Term Debt (Detail) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total long-term debt		$ (666,800)	$ (600,800)
Debt Instrument, Unused Borrowing Capacity, Amount		255,000
Total Long-term debt		665,736	599,871
Less: current maturities		(19,994)	(21,483)
Less: debt issuance costs		1,042	946
Total long-term debt, net of current maturities		645,742	578,388
Aggregated Unfunded Commitments [Member]
Debt Instrument [Line Items]
Total long-term debt		0
5.93% note, due October 31, 2023 [Member]
Debt Instrument [Line Items]
Total long-term debt		$ (1,500)	(3,000)
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		$ (8,700)	(11,600)
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		$ (3,500)	(4,200)
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		$ (12,000)	(12,000)
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		$ (30,000)	(35,000)
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		$ (63,000)	(66,500)
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		$ (8,078)	(8,517)
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
Aggregate Shelf Agreements [Member]
Debt Instrument [Line Items]
Total long-term debt		$ (350,000)
Aggregate Shelf Agreements [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		605,000
Prudential [Member]
Debt Instrument [Line Items]
Total long-term debt	[1]	(300,000)
Debt Instrument, Unused Borrowing Capacity, Amount	[1]	105,000
Prudential [Member] | Aggregated Unfunded Commitments [Member]
Debt Instrument [Line Items]
Total long-term debt	[1]	0
Prudential [Member] | Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Total long-term debt		(80,000)
Prudential [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	[1]	405,000
MetLife [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	[1]	200,000
Total long-term debt		(50,000)
Debt Instrument, Unused Borrowing Capacity, Amount	[1]	$ 150,000
[1] (1) The Prudential and MetLife Shelf Agreements both expire in February 2026.

Long-Term Debt - Outstanding _2

Long-Term Debt - Outstanding Long-Term Debt- Supplemental Information (Detail)	6 Months Ended
	Jun. 30, 2023
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		6 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Document Period End Date		Jun. 30, 2023
Long-term debt including current maturities		$ 666,800	$ 600,800
Debt Instrument, Unused Borrowing Capacity, Amount		255,000
Short-term borrowing		$ 95,807	202,157
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		63,000	66,500
Aggregated Unfunded Commitments [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities		0
Equipment Security Note
Debt Instrument [Line Items]
Long-term debt including current maturities		$ 8,078	8,517
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
Aggregate Shelf Agreements [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities		$ 350,000
MetLife [Member]
Debt Instrument [Line Items]
Senior notes	[1]	200,000
Long-term debt including current maturities		50,000
Debt Instrument, Unused Borrowing Capacity, Amount	[1]	150,000
Prudential [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	[1]	300,000
Debt Instrument, Unused Borrowing Capacity, Amount	[1]	105,000
Prudential [Member] | Aggregated Unfunded Commitments [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	[1]	0
Prudential [Member] | Uncollateralized Senior Note Due March 14, 2038
Debt Instrument [Line Items]
Long-term debt including current maturities		80,000
Maximum [Member] | Aggregate Shelf Agreements [Member]
Debt Instrument [Line Items]
Senior notes		605,000
Maximum [Member] | Prudential [Member]
Debt Instrument [Line Items]
Senior notes	[1]	$ 405,000
[1] (1) The Prudential and MetLife Shelf Agreements both expire in February 2026.

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2021	Sep. 30, 2021	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Ratio of Indebtedness to Net Capital			0.65
Notional Amount of Nonderivative Instruments	$ 40,000,000	$ 30,000,000	$ 50,000,000
Line of Credit Facility, Remaining Borrowing Capacity			298,300,000
Short-term borrowing			$ 95,807,000	$ 202,157,000
Short-term Debt, Weighted Average Interest Rate, at Point in Time			5.33%	5.04%
Draws on letters of credit			$ 5,900,000
Revolving Line of Credit, Short-term
Short-term Debt [Line Items]
Debt Instrument, Fee			9
Debt Instrument, Interest Rate, Stated Percentage			7,000%
Aggregate Investment, Maximum				$ 150,000,000
Interest Rate Credit Adjustment			10
Borrowings Outstanding, Sustainable Investing			$ 9,400,000
Revolving Line of Credit, Long-term
Short-term Debt [Line Items]
Debt Instrument, Fee			9
Debt Instrument, Interest Rate, Stated Percentage			9,500%
Interest Rate Credit Adjustment			10
3.48% note, due May 31, 2038 [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.48%
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			$ 400,000,000
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			3.98%	0.17%	0.205%

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Lease Disclosure [Abstract]
Operating Lease, Right-of-Use Asset	$ 13,432	$ 14,421
Operating Lease, Liability, Current	2,373	2,552
Operating Lease, Liability, Noncurrent	11,585	12,392
Total Operating and Finance Lease Liabilities	$ 13,958	$ 14,944

Leases Leases - Lease Cost Addi

Leases Leases - Lease Cost Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Lease, Cost [Abstract]
Operating Lease, Cost	$ 780	[1]	$ 726	[1]	$ 1,568	$ 1,377
[1](1) Includes short-term leases and variable lease costs, which are immaterial

Leases Leases - Right of Use As

Leases Leases - Right of Use Asset and Lease Liability Balance Sheet Classification Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases - Right of Use Asset and Lease Liability Balance Sheet Classification [Abstract]
Operating Lease, Right-of-Use Asset	$ 13,432	$ 14,421
Operating Lease, Liability, Current	2,373	2,552
Operating Lease, Liability, Noncurrent	11,585	12,392
Total Operating and Finance Lease Liabilities	$ 13,958	$ 14,944

Leases Leases - Weighted Averag

Leases Leases - Weighted Average Remaining Lease Term Additional Information (Details)	Jun. 30, 2023	Dec. 31, 2022
Leases - Weighted Average Remaining Lease term Additional Information [Abstract]
Operating Lease, Weighted Average Discount Rate, Percent	3.50%	3.40%
Operating Lease, Weighted Average Remaining Lease Term	8 years 4 months 13 days	8 years 6 months 14 days

Leases Leases - Cash Flow Addit

Leases Leases - Cash Flow Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Leases - Cash Flow Additional Information [Abstract]
Operating Cash Flow from Operating Leases	$ 1,465	$ 1,428

Leases Leases - Schedule of Fut

Leases Leases - Schedule of Future Maturities Additional Information (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Leases - Schedule of Future Maturities Additional Information [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 1,419	[1]
Lessee, Operating Lease, Liability, to be Paid, Year One	2,629	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Two	2,263	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Three	1,734	[1]
Lessee, Operating Lease, Liability, Payments, Due	16,051	[1]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(2,093)
Operating Lease, Liability	13,958	[1]
Lessee Future Operating Lease Option Payments	2,100
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,571	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,192	[1]
Lessee, Operating Lease, Liability, to be Paid, after Year Five	$ 5,243	[1]
[1]Operating lease payments include $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.