Employee Benefit Plans - Components of SERP Expense (Details) - SERP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of Net Periodic Benefits Cost:
Service cost	$ 1,248	$ 1,191	$ 1,392
Interest cost	1,644	1,022	915
Amortization of net (gain) loss	(34)	580	1,678
Net periodic pension cost under accounting standards	$ 2,858	$ 2,793	$ 3,985
Weighted-average assumptions used to determine net periodic cost:
Discount rate	5.42%	2.87%	2.52%
Minimum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	5.50%	5.50%
Maximum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	4.00%	4.00%