Employee Benefit Plans - Summary of the Activity in the SERP's Projected Benefit Obligation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Benefit obligation:
Beginning balance	$ 85,433,000	$ 117,323,000
Interest cost	4,314,000	3,293,000
Benefits paid	(3,485,000)	(3,201,000)
Actuarial gain	865,000	(31,982,000)
Ending balance	87,127,000	85,433,000	$ 117,323,000
SERP
Benefit obligation:
Beginning balance	9,579,000	12,420,000
Service cost	0	0	147,000
Interest cost	472,000	318,000	291,000
Benefits paid	(400,000)	(348,000)	(282,000)
Actuarial gain	(150,000)	2,811,000
Ending balance	$ 9,501,000	$ 9,579,000	$ 12,420,000