Debt - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Short term borrowings	$ 31,500	$ 20,833
Maturity of federal funds purchased from correspondent banks	one business day
Maximum borrowing capacity	$ 2,700,000
Current borrowing available	1,500,000
Federal home loan bank, maximum amount available, net of deposits and advances	1,900,000
Long-term debt outstanding	3,021	23,139
Letter of credit outstanding, amount	406,500	162,500
Other Correspondent Banks
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	35,000
Outstanding drawings	$ 0	$ 0