Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net income	$ 117,380	$ 121,024
Other comprehensive income (loss), net of tax:
Reclassification adjustments of benefit plan liability - prior service cost (net of tax of $0 and $6, respectively)	0	(18)
Reclassification adjustments of benefit plan liability - net loss (net of tax of $(16) and $(45), respectively)	28	143
Net unrealized gains (losses) on commodity derivatives (net of tax of $268 and $(340), respectively)	(855)	1,047
Other comprehensive income (loss), net of tax	1,220	6
Comprehensive income	118,600	121,030
Less: comprehensive income attributable to non-controlling interest	(3,296)	(3,498)
Comprehensive income available for common stock	115,304	117,532
Interest rate swaps
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	563	536
Commodity derivatives
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	$ 1,484	$ (1,702)