Employee Benefits - Additional Information (Details) - USD ($)				3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 27, 2022	Jan. 01, 2018	Jan. 01, 2017	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2021	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Minimum percentage of voluntary contributions by participating employees						1.00%
Maximum percentage of voluntary contributions by participating employees						75.00%
Defined Contribution Plan, Tax Status						us-gaap:QualifiedPlanMember	us-gaap:QualifiedPlanMember
Defined contribution plan, employer matching contribution, percent of match						100.00%
Defined contribution plan, employer matching contribution, percent of employees' compensation						7.00%
Defined contribution plan, pension expense				$ 121,000	$ 120,000	$ 365,000	$ 351,000
Defined contribution plan, employee incentive plan expense				$ 354,000	363,000	$ 1,041,000	1,077,000
Amount borrowed under ESOP	$ 7,300,000
Shares purchased under ESOP	734,020			731,056		731,056			732,635
ESOP loan term	20 years
ESOP interest rate	4.75%
Total compensation expense				$ 124,000	114,000	$ 356,000	365,000
Director
Defined Benefit Plan Disclosure [Line Items]
Percentage of director fees				100.00%		100.00%
Percentage of vested deferred fees and interest				100.00%		100.00%
Deferred compensation liability				$ 724,000		$ 724,000			$ 698,000
Supplemental Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Liability related expense, to withdrawal				1,064,000		1,064,000			1,106,000
Defined benefit plan, pension expense				13,000	(19,000)	38,000	(58,000)
Director Fee Continuation Plan
Defined Benefit Plan Disclosure [Line Items]
Liability related expense, to withdrawal				823,000		823,000			769,000
Defined benefit plan, pension expense				28,000	23,000	84,000	67,000
Defined benefit plan, vesting percentage			100.00%
Supplemental Executive Retirement Agreement
Defined Benefit Plan Disclosure [Line Items]
Liability related expense, to withdrawal				3,339,000		3,339,000			$ 3,200,000
Defined benefit plan, pension expense				46,000	30,000	139,000	89,000
Defined benefit plan, employer matching contribution, percent of employees' compensation		60.00%
Defined benefit plan, vesting percentage		100.00%
Defined benefit plan vesting period		10 years
Executive Deferred Compensation Agreement
Defined Benefit Plan Disclosure [Line Items]
Percentage of contribution								10.00%
Deferred compensation plan				24,000	41,000	71,000	63,000
Survivor Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, pension expense				$ 0	$ 0	$ 0	$ 0
Number of years of compensation						2 years