CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOW FROM OPERATING ACTIVITIES:
Net income	$ 87,562	$ 47,650
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	119,142	112,520
Impairment of assets and other charges	0	71,230
Deferred income taxes	30,707	36,712
Gains on sale of property and equipment	(944)	(661)
Changes in undistributed stock compensation	961	3,436
Equity AFUDC	(1,839)	(82)
Changes in current assets and liabilities:
Accounts receivable, net of allowances	26,110	(40,185)
Accrued utility revenue	34,500	31,200
Deferred purchased gas costs	354,203	(535,224)
Accounts payable	(69,863)	(305,272)
Accrued taxes	33,311	34,950
Other current assets and liabilities	(28,763)	371,035
Changes in deferred charges and other assets	(15,982)	(1,565)
Changes in other liabilities and deferred credits	(25,396)	(11,486)
Net cash provided by (used in) operating activities	543,709	(185,742)
CASH FLOW FROM INVESTING ACTIVITIES:
Construction expenditures and property additions	(221,198)	(219,124)
Proceeds from the sale of business, net of cash sold	0	1,058,272
Proceeds from the sale of property	21,377	0
Changes in customer advances	(1,658)	(6,608)
Other	1,689	3,125
Net cash provided by (used in) investing activities	(199,790)	835,665
CASH FLOW FROM FINANCING ACTIVITIES:
Issuance of common stock, net	2,372	239,337
Centuri distribution to redeemable noncontrolling interest	(37)	0
Dividends paid	(44,389)	(41,631)
Issuance of long-term debt, net	55,897	305,896
Retirement of long-term debt	(16,488)	(84,224)
Change in short-term portion of credit facility	15,500	(155,000)
Change in long-term credit facility and commercial paper	0	(50,000)
Issuance of short-term debt	0	450,000
Repayment of short-term debt	0	(1,372,746)
Withholding remittance - share-based compensation	(1,971)	(1,506)
Other, including principal payments on finance leases	(3,190)	(4,949)
Net cash provided by (used in) financing activities	7,694	(714,823)
Effects of currency translation on cash and cash equivalents	(197)	104
Change in cash and cash equivalents	351,416	(64,796)
Cash and cash equivalents at beginning of period	106,536	123,078
Cash and cash equivalents at end of period	457,952	82,085
SUPPLEMENTAL INFORMATION:
Interest paid, net of amounts capitalized	65,281	68,018
Income taxes paid, net	$ 1,833	$ 2,381