Benefit Plans - Defined Benefit Plans - Components of Pension Cost (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Supplemental Retirement Plan
Components of net periodic benefit cost:
Service cost	$ 347,000	$ 480,000
Interest cost	865,000	759,000
Amortization of prior transition obligation		100,000
Amortization of net actuarial loss	455,000	543,000
Net periodic benefit cost	1,667,000	1,882,000
Amount recognized in other comprehensive income	5,297,000	1,098,000
Defined Benefit Plan, Assets for Plan Benefits	0
Split-Dollar Life Insurance Benefit Plan
Components of net periodic benefit cost:
Amortization of prior transition obligation and actuarial losses	(41,000)	(4,000)
Interest cost	246,000	219,000
Net periodic benefit cost	205,000	215,000
Amount recognized in other comprehensive income	$ 2,389,000	$ 660,000