Debt - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Short term borrowings	$ 0	$ 2,000
Maturity of federal funds purchased from correspondent banks	one business day
Maximum borrowing capacity	$ 2,600,000
Current borrowing available	1,700,000
Federal home loan bank, maximum amount available, net of deposits and advances	1,900,000
Letter of credit outstanding, amount	160,500	156,000
Other Correspondent Banks
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	35,000
Outstanding drawings	$ 0	$ 0