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Goodwill and other intangibles (Tables)
3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
The following table shows the activity in goodwill and other intangible assets for the three-month periods ended March 31, 2025 and 2024.

(in thousands)GoodwillOther
intangible assets
Total
December 31, 2023$159,595 $4,652 $164,247 
Amortization— 320 320 
March 31, 2024$159,595 $4,332 $163,927 
December 31, 2024$159,595 $3,437 $163,032 
Amortization 274 274 
March 31, 2025$159,595 $3,163 $162,758 
Intangible Assets Disclosure [Text Block]
The following table shows the balance of acquired intangible assets at March 31, 2025 and at December 31, 2024:

March 31, 2025
December 31, 2024
(in thousands)Gross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Other intangible assets:
Core deposit intangible assets$14,456 $11,293 $14,456 $11,019 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Estimated amortization expense related to core deposit intangible assets for the remainder of 2025 and the next four years follows:

(in thousands)Total
Nine months ending December 31, 2025$768 
2026887 
2027754 
2028618 
2029136