Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating revenues:
Operating revenues:	$ 1,213,825	$ 1,430,098
Operating expenses:
Total operation and maintenance	671,917	796,545
Purchased natural gas sold	258,602	371,015
Depreciation and amortization	55,750	52,233
Taxes, other than income	58,992	67,428
Electric fuel and purchased power	32,617	24,356
Total operating expenses	1,077,878	1,311,577
Operating income	135,947	118,521
Other income	13,787	10,374
Interest expense	28,706	23,953
Income before income taxes	121,028	104,942
Income taxes	20,130	21,067
Income from continuing operations	100,898	83,875
Discontinued operations, net of tax	0	(45,522)
Net income	$ 100,898	$ 38,353
Earnings per share - basic:
Income from continuing operations (in usd per share)	$ 0.50	$ 0.41
Discontinued operations, net of tax (in usd per share)	0	(0.22)
Earnings per share - basic (in usd per share)	0.50	0.19
Earnings per share - diluted:
Income from continuing operations (in usd per share)	0.49	0.41
Discontinued operations, net of tax (in usd per share)	0	(0.22)
Earnings per share - diluted (in usd per share)	$ 0.49	$ 0.19
Weighted average common shares outstanding - basic (in shares)	203,779	203,624
Weighted average common shares outstanding - diluted (in shares)	204,187	203,910
Regulated operation
Operating revenues:
Operating revenues:	$ 586,017	$ 673,932
Operating expenses:
Total operation and maintenance	105,680	102,041
Income from continuing operations	73,343	64,464
Nonregulated operation
Operating revenues:
Operating revenues:	627,808	756,166
Operating expenses:
Total operation and maintenance	566,237	694,504
Income from continuing operations	$ 27,555	$ 19,411