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Servicing - Summary of Mortgage Servicing Rights Capitalized and Amortized (Detail) - 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
Servicing Asset at Amortized Cost [Line Items]
Beginning of Year			$ 5,648
End of Year	$ 5,644		5,644		$ 5,648
Valuation Allowance			49		7
Mortgage Servicing Rights [Member]
Servicing Asset at Amortized Cost [Line Items]
Beginning of Year	5,511	$ 5,637	5,655	$ 3,549	3,549
Capitalized Additions	359	158	570	2,567
Amortization	(177)	(105)	(532)	(426)
End of Year	5,693	5,690	5,693	5,690	$ 5,655
Valuation Allowance	(49)	(3)	(49)	(3)
Mortgage Servicing Rights net, September 30	$ 5,644	$ 5,687	$ 5,644	$ 5,687

X

- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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X

- Definition

Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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X

- Definition

Amount of increase (decrease) in the amortized amount from a decrease (increase) in the valuation allowance applied to the servicing asset for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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