Securities - HTM in an Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2026 USD ($) item	Dec. 31, 2025 USD ($) item
Number of Securities
Unrealized loss for less than twelve months | item	14	2
Unrealized loss for twelve months or longer | item	277	281
Total | item	291	283
Fair Value
Unrealized loss for less than twelve months	$ 85,843	$ 11,837
Unrealized loss for twelve months or longer	557,372	583,625
Total	643,215	595,462
Unrealized Losses
Unrealized loss for less than twelve months	748	2
Unrealized loss for twelve months or longer	56,990	54,636
Total	$ 57,738	$ 54,638
Residential mortgage-backed securities
Number of Securities
Unrealized loss for less than twelve months | item	4	1
Unrealized loss for twelve months or longer | item	45	45
Total | item	49	46
Fair Value
Unrealized loss for less than twelve months	$ 49,795	$ 11,337
Unrealized loss for twelve months or longer	208,713	214,351
Total	258,508	225,688
Unrealized Losses
Unrealized loss for less than twelve months	533	2
Unrealized loss for twelve months or longer	18,490	18,306
Total	$ 19,023	$ 18,308
Commercial mortgage-backed securities
Number of Securities
Unrealized loss for less than twelve months | item	2
Unrealized loss for twelve months or longer | item	18	20
Total | item	20	20
Fair Value
Unrealized loss for less than twelve months	$ 6,318
Unrealized loss for twelve months or longer	89,842	$ 102,228
Total	96,160	102,228
Unrealized Losses
Unrealized loss for less than twelve months	86
Unrealized loss for twelve months or longer	5,662	6,088
Total	$ 5,748	$ 6,088
Collateralized mortgage obligations
Number of Securities
Unrealized loss for less than twelve months | item	2
Unrealized loss for twelve months or longer | item	51	51
Total | item	53	51
Fair Value
Unrealized loss for less than twelve months	$ 21,123
Unrealized loss for twelve months or longer	199,739	$ 206,483
Total	220,862	206,483
Unrealized Losses
Unrealized loss for less than twelve months	44
Unrealized loss for twelve months or longer	27,090	25,577
Total	$ 27,134	$ 25,577
States and political subdivisions
Number of Securities
Unrealized loss for less than twelve months | item	6	1
Unrealized loss for twelve months or longer | item	163	165
Total | item	169	166
Fair Value
Unrealized loss for less than twelve months	$ 8,607	$ 500
Unrealized loss for twelve months or longer	59,078	60,563
Total	67,685	61,063
Unrealized Losses
Unrealized loss for less than twelve months	85
Unrealized loss for twelve months or longer	5,748	4,665
Total	$ 5,833	$ 4,665