Pension Plan and Employee Benefits - 401 (K) Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Contribution Plan Disclosure [Line Items]
401(k) Plan expense	$ 2,154	$ 2,179
Affiliated entity
Defined Contribution Plan Disclosure [Line Items]
401(k) Plan expense	$ 902	$ 910