Income Taxes - Deferred Tax Components (Details) - USD ($) $ in Thousands	24 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Hawaii franchise tax	$ 117	$ 377
Allowance for credit/loan losses	1,364	541
Employee benefit plans	2,672	2,714
Equity incentive plan	107	141
Unrealized losses on securities available-for-sale	637	725
Deferred compensation	22	199
Net lease liability	1,312	212
Other	11	16
Total	6,242	4,925
Deferred tax liabilities:
Deferred loan costs	2,665	2,601
Premises and equipment	273	254
FHLB stock dividends	126	125
Prepaid expense	653	226
Premium on loans sold	68	76
Total	3,785	3,282
Net deferred tax assets	$ 2,457	$ 1,643
Federal statutory corporate tax rate (as a percent)	21.00%
Valuation allowance for deferred tax assets	$ 0