Employee Benefit Plans - Components of SERP Expense (Details) - SERP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Net Periodic Benefits Cost:
Service cost	$ 1,191	$ 1,392	$ 1,029
Interest cost	1,022	915	988
Amortization of net loss	580	1,678	843
Net periodic pension cost under accounting standards	$ 2,793	$ 3,985	$ 2,860
Weighted-average assumptions used to determine net periodic cost:
Discount rate	2.87%	2.52%	3.36%
Rate of compensation increase			4.00%
Minimum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	4.00%	4.00%
Maximum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	4.50%	4.50%