Benefit Plans - Net Periodic Benefit Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of net periodic benefit (credit):
Service cost	$ 821	$ 1,140	$ 1,347
Interest cost	1,538	1,538	1,642
Expected return on plan assets	(2,596)	(2,375)	(2,323)
Amortization of net loss	3	245	176
Amortization of prior service cost	0	0	1
Effect of curtailment	0	(2,032)	0
Net periodic benefit credit	$ (234)	$ (1,484)	$ 843
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag			Interest cost
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Expected return on plan assets
Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain (Loss) Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Amortization of net loss