Employee Benefit Plans - Schedule of Changes in Projected Benefit Obligations, Plan Assets and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in plan assets
Plan assets at beginning of period	$ 1,345,000
Plan assets at end of period	1,404,000	$ 1,345,000
Retirement Plans
Change in benefit obligation
Benefit obligation at beginning of period	1,056,000	1,078,000
Projected benefit obligation of acquired plans	389,000	0
Service cost	14,000	15,000	$ 14,000
Interest cost	43,000	30,000	34,000
Actuarial (gain) loss	(324,000)	(31,000)
Benefits paid	(63,000)	(36,000)
Plan termination	0	0
Benefit obligation at end of period	1,115,000	1,056,000	1,078,000
Change in plan assets
Plan assets at beginning of period	1,345,000	1,236,000
Fair value of plan assets of acquired plans	386,000	0
Actual (loss) return on plan assets	(270,000)	145,000
Benefits paid	(57,000)	(36,000)
Plan assets at end of period	1,404,000	1,345,000	$ 1,236,000
Funded status at December 31	289,000	289,000
Information for pension plans with a benefit obligation in excess of plan assets
Projected and accumulated benefit obligations	54,000	0
Postretirement Plans
Change in benefit obligation
Benefit obligation at beginning of period	0
Projected benefit obligation of acquired plans	28,000
Service cost	0
Interest cost	0
Actuarial (gain) loss	0
Benefits paid	(1,000)
Plan termination	(27,000)
Benefit obligation at end of period	0	0
Change in plan assets
Plan assets at beginning of period	0
Fair value of plan assets of acquired plans	0
Actual (loss) return on plan assets	0
Benefits paid	0
Plan assets at end of period	0	$ 0
Funded status at December 31	0
Information for pension plans with a benefit obligation in excess of plan assets
Projected and accumulated benefit obligations	$ 0