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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 218,111	$ 302,556	$ 520,711	$ 451,712
Defined benefit pension plans
Amortization of actuarial (gain) loss, net of tax	16	(3)	32	(7)
Effects of Settlements, net of tax	0	0	98	0
Other comprehensive income (loss), net of tax	16	(3)	130	(7)
Comprehensive income	$ 218,127	$ 302,553	$ 520,841	$ 451,705

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