Benefit Plans - Defined Benefit Plans - Components of Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Supplemental Retirement Plan
Components of net periodic benefit cost:
Service cost	$ 52	$ 48	$ 154	$ 144
Interest cost	318	324	954	972
Amortization of net actuarial loss	26	13	78	39
Net periodic benefit cost	396	385	1,186	1,155
Amount recognized in other comprehensive income (loss)	18	9	54	27
Split-Dollar Life Insurance Benefit Plan
Components of net periodic benefit cost:
Amortization of prior transition obligation and actuarial losses	(53)	(48)	(157)	(143)
Interest cost	87	92	259	274	$ 365
Net periodic benefit cost	34	44	102	131
Amount recognized in other comprehensive income (loss)	$ (53)	$ (48)	$ (157)	$ (143)