Securities - Amortized cost and fair value (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	$ 1,265,644	$ 1,257,745
Unrealized Gains	2,691	5,285
Unrealized Losses	(163,707)	(113,504)
Fair Value	1,104,628	1,149,526
U.S. Government agencies
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	100,256	91,945
Unrealized Gains	2	114
Unrealized Losses	(10,811)	(7,749)
Fair Value	89,447	84,310
Mortgage Backed Securities - residential
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	559,954	573,002
Unrealized Gains	2	873
Unrealized Losses	(75,235)	(58,456)
Fair Value	484,721	515,419
Mortgage Backed Securities - commercial
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	12,360	12,712
Unrealized Gains		2
Unrealized Losses	(857)	(328)
Fair Value	11,503	12,386
Collateralized mortgage obligations
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	170,668	179,638
Unrealized Gains	7	82
Unrealized Losses	(27,470)	(21,622)
Fair Value	143,205	158,098
State and municipal obligations
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	402,083	379,894
Unrealized Gains	12	1,280
Unrealized Losses	(46,797)	(23,456)
Fair Value	355,298	357,718
Municipal taxable
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	20,075	20,554
Unrealized Gains	7	84
Unrealized Losses	(2,524)	(1,893)
Fair Value	17,558	18,745
Collateralized debt obligations
Amortized cost and fair value of investments classified as available for sale
Amortized Cost	248
Unrealized Gains	2,661	2,850
Unrealized Losses	(13)
Fair Value	$ 2,896	$ 2,850

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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