Investment Securities - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Securities Financing Transactions Disclosures [Abstract]
Available-for-sale securities	$ 427,352		$ 260,477
AFS accrued interest	$ 2,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable
Held-to-maturity securities	$ 354,094		382,447
HTM accrued interest	$ 2,000
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable
Available-for-sale securities pledged as collateral	$ 520,600		440,000
Letter of credit outstanding, amount	160,500		$ 156,000
Net gains	$ 0	$ 0