Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities
Net Income	$ 46,168	$ 36,344
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,909	17,183
Depreciation and accretion included in other costs	4,016	2,834
Deferred income taxes	11,905	2,453
Realized (loss) on commodity contracts and sale of assets	(1,811)	(284)
Unrealized (gain) loss on investments/commodity contracts	(830)	(551)
Employee benefits and compensation	(24)	119
Share-based compensation	2,113	2,408
Changes in assets and liabilities:
Accounts receivable and accrued revenue	7,806	5,641
Propane inventory, storage gas and other inventory	4,769	5,373
Regulatory assets/liabilities, net	10,059	24,607
Prepaid expenses and other current assets	2,572	3,985
Accounts payable and other accrued liabilities	(10,114)	(21,166)
Income taxes receivable/payable	4,647	10,095
Customer deposits and refunds	(2,745)	(476)
Accrued compensation	(9,480)	(8,436)
Other assets and liabilities, net	1,195	38
Net cash provided by operating activities	97,282	81,667
Investing Activities
Property, plant and equipment expenditures	(75,512)	(42,418)
Proceeds from sale of assets	250	506
Environmental expenditures	61	742
Net cash used in investing activities	(74,711)	(42,654)
Financing Activities
Common stock dividends	(12,884)	(9,492)
Issuance of stock under the Dividend Reinvestment Plan, net of offering fees	41	0
Tax withholding payments related to net settled stock compensation	(1,466)	(2,455)
Change in cash overdrafts due to outstanding checks	715	(323)
Net repayments under line of credit agreements	(10,213)	(107,755)
Proceeds from long-term debt, net of offering fees	0	79,840
Repayment of long-term debt	(1,973)	(1,967)
Net cash used in financing activities	(25,780)	(42,152)
Net Decrease in Cash and Cash Equivalents	(3,209)	(3,139)
Cash and Cash Equivalents—Beginning of Period	4,904	6,204
Cash and Cash Equivalents—End of Period	1,695	3,065
Payments to Acquire Businesses, Gross	612	0
Accrued compensation	(9,480)	(8,436)
Net Income	46,168	36,344
Depreciation and amortization	16,909	17,183
Depreciation and accretion included in other costs	4,016	2,834
Deferred Income Tax Expense (Benefit)	11,905	2,453
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	1,811	284
Unrealized Gain (Loss) on Commodity Contracts	830	551
Employee benefits and compensation	(24)	119
Share-based compensation	2,113	2,408
Increase (Decrease) in Accounts Receivable	(7,806)	(5,641)
Increase (Decrease) in Inventories	(4,769)	(5,373)
Increase (Decrease) in Regulatory Assets and Liabilities	(10,059)	(24,607)
Increase (Decrease) in Prepaid Expense and Other Assets	(2,572)	(3,985)
Accounts payable and other accrued liabilities	(10,114)	(21,166)
Increase (Decrease) in Income Taxes Receivable	(4,647)	(10,095)
Customer deposits and refunds	(2,745)	(476)
Increase (Decrease) in Interest Payable, Net	10,127	1,500
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(1,195)	(38)
Net Cash Provided by (Used in) Operating Activities	97,282	81,667
Payments to Acquire Property, Plant, and Equipment	75,512	42,418
Proceeds from sale of assets	250	506
Environmental expenditures	61	742
Net cash used in investing activities	(74,711)	(42,654)
Payments of Ordinary Dividends, Common Stock	12,884	9,492
Issuance of stock under the Dividend Reinvestment Plan, net of offering fees	41	0
Payment, Tax Withholding, Share-based Payment Arrangement	1,466	2,455
Change in cash overdrafts due to outstanding checks	715	(323)
Net repayments under line of credit agreements	(10,213)	(107,755)
Proceeds from long-term debt, net of offering fees	0	(79,840)
Repayments of Long-term Debt	1,973	1,967
Net cash used in financing activities	(25,780)	(42,152)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(3,209)	(3,139)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,695	$ 3,065