Benefits Plans - Net periodic pension expense (Details) - Pension Plan - DRP - USD ($)	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024
Net periodic pension expense:
Service cost	$ 23,000	$ 31,000	$ 80,000	$ 93,000
Interest cost	21,000	10,000	64,000	30,000
Actuarial gain recognized	(13,000)	(8,000)	(39,000)	(24,000)
Total net periodic pension expense included in other non-interest expenses	31,000	33,000	$ 105,000	$ 99,000
Unrecognized net gain (loss) included in accumulated other comprehensive income	$ (18,000)	$ (18,000)			$ (54,000)