Fair value of financial instruments (Details) $ in Thousands	3 Months Ended
Mar. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Corporate debt securities \| security	33
Aggregate amortized cost	$ 546,430	$ 575,288
Available for sale, Fair Value	503,043	526,329
Fair value of assets transfers into level 3	0
Fair value of assets transfers out of level 3	0
Fair value of liabilities transfers into level 3	0
Fair value of liabilities transfers out of level 3	$ 0
Market Not Active
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Corporate debt securities \| security	3
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale, Fair Value	$ 4,790	4,622
Level 3 \| Other Assets.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned	738	738
Level 3 \| Residential real estate property \| Other Assets.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned		$ 27
Number of residential real estate properties \| property		1
Level 3 \| Former community banking office \| Other Assets.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned		$ 711
Number of former community banking office properties \| property		1
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Aggregate amortized cost	28,745	$ 31,442
Available for sale, Fair Value	29,217	$ 31,621
Corporate debt securities \| Market Not Active
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Aggregate amortized cost	4,300
Corporate debt securities \| Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale, Fair Value	29,200
Corporate debt securities \| Recurring Basis \| Market Not Active
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale, Fair Value	$ 4,800

The number of corporate debt securities owned by the company.

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- Definition

Represents the number of former community banking office properties.

+ References

No definition available.

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- Definition

Represents the number of residential real estate properties.

+ References

No definition available.

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- Definition

Fair value disclosure of other real estate owned at the end of the period.

+ References

No definition available.

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Topic 326
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-Paragraph 1
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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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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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Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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