Estimated annual amortization expense of core deposit intangibles (Details) - USD ($) $ in Thousands	12 Months Ended	72 Months Ended
Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2026
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
CDI amortization	$ 13	$ 25	$ 61	$ 128	$ 192	$ 255	$ 674

Amount of expense charged against earnings to allocate the cost of tangible and intangible assets over their remaining economic lives, classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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