Pension Plan and Employee Benefits - 401 (K) Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Contribution Plan Disclosure [Line Items]
401(k) Plan expense	$ 2,180	$ 2,512	$ 6,602	$ 7,391
Affiliated entity
Defined Contribution Plan Disclosure [Line Items]
401(k) Plan expense	$ 985	$ 1,185	$ 3,154	$ 3,511