CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 871,142	$ 1,183,370	$ 411,778
Postretirement benefits:
Actuarial (loss) gain	(12)	482	62
Prior service cost	296	0	0
Amortization of prior service costs	(41)	292	369
Income tax expense	(63)	(157)	(102)
Total comprehensive income	$ 871,322	$ 1,183,987	$ 412,107