CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 113,540		$ 200,934		$ 315,681	$ 479,473
Defined benefit pension plans
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(4,559)		1,492		(2,055)	10,140
Applicable income taxes	1,204		(404)		543	(2,696)
Defined benefit pension plans, net of income taxes	(3,355)		1,088		(1,512)	7,444
Applicable income taxes	0		0		0	0
Foreign currency translation adjustment	61		(140)		(109)	479
Foreign currency translation adjustment, net of income taxes	61	$ (170)	(140)	$ 619	(109)	479
Other comprehensive income (loss)	(3,294)		948		(1,621)	7,923
Comprehensive income	110,246		201,882		314,060	487,396
Comprehensive income attributable to noncontrolling interests	(7,366)	$ (5,590)	(3,274)	$ (4,403)	(12,956)	(7,677)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	$ 102,880		$ 198,608		$ 301,104	$ 479,719