Loans and Allowance for Credit Losses - Loans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses [Line Items]
Net deferred loan fees	$ 2,800		$ 2,800		$ 3,800
Accrued interest	$ 25,100		$ 25,100		22,900
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets
Interest income on nonaccrual loans	$ 840	$ 165	$ 1,600	$ 456
Foreclosure proceedings in process	558		558		861
Loans, net of unearned income	4,821,134		4,821,134		$ 4,443,070
Financing receivable, excluding accrued interest, modified period	0	$ 287	$ 0	$ 379
Weighted average term increase from modification (in years)			2 years
Mortgage-backed securities
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, net of unearned income	$ 18,000		$ 18,000