CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES:
Net Income	$ 62,530	$ 59,110
Items not affecting cash:
Depreciation and depletion	53,248	48,905
Amortization of debt issuance costs, discount and deferred hedge gain	1,349	1,270
Stock-based compensation costs	3,308	2,757
Equity portion of allowance for funds used during construction	(3,715)	(3,116)
Loss on disposition of assets	(18)	(1)
Deferred income taxes	(10,420)	(6,558)
Changes in current assets and liabilities:
Accounts receivable	26,208	24,936
Inventories	14,814	10,005
Other current assets	4,714	1,181
Accounts payable	(44,193)	(3,432)
Accrued expenses and other	58,236	46,119
Regulatory assets	49,391	14,961
Regulatory liabilities	(1,378)	(1,003)
Other noncurrent assets	1,290	7,153
Other noncurrent liabilities	(1,665)	(6,621)
Cash Provided by Operating Activities	213,699	195,666
INVESTING ACTIVITIES:
Property, plant, and equipment additions	(136,604)	(115,502)
Investment in equity securities	0	(567)
Cash Used in Investing Activities	(136,604)	(116,069)
FINANCING ACTIVITIES:
Dividends on common stock	(38,041)	(33,901)
Issuance of long-term debt	220,000	0
Line of credit repayments, net	(253,000)	(33,000)
Other financing activities, net	(1,415)	(560)
Cash Used in Financing Activities	(72,456)	(67,461)
Increase in Cash, Cash Equivalents, and Restricted Cash	4,639	12,136
Cash, Cash Equivalents, and Restricted Cash, beginning of period	22,463	18,762
Cash, Cash Equivalents, and Restricted Cash, end of period	27,102	30,898
Cash paid during the period for:
Income taxes	3,204	0
Interest	18,196	14,152
Significant non-cash transactions:
Capital expenditures included in accounts payable	$ 12,209	$ 17,156