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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 302,600	$ 149,156
Defined benefit pension plans
Amortization of actuarial (gain) loss, net of tax	16	(4)
Effects of Settlements, net of tax	98	0
Other comprehensive income (loss), net of tax	114	(4)
Comprehensive income	$ 302,714	$ 149,152

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