Goodwill and Other Intangible Assets - Schedule of Changes in Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Finite-lived Intangible Assets [Roll Forward]
Core deposit premiums, beginning of period	$ 84,423
Amortization	(3,097)	$ (3,527)
Core deposit premiums, end of period	81,325		$ 84,423
Core deposit premiums:
Finite-lived Intangible Assets [Roll Forward]
Core deposit premiums, beginning of period	76,390	87,575	87,575
Amortization	(2,689)		(11,185)
Core deposit premiums, end of period	73,701		76,390
Books of business and other intangibles:
Finite-lived Intangible Assets [Roll Forward]
Core deposit premiums, beginning of period	8,033	$ 9,667	9,667
Amortization	(409)		(1,634)
Core deposit premiums, end of period	$ 7,624		$ 8,033