Loans and Allowance for Credit Losses on Loans HFI - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 01, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Collateral securing line of credit		$ 2,708,821		$ 2,708,821		$ 2,608,687
Accrued interest receivable on loans		52,549		52,549		40,970
Accrued interest receivable written off as an adjustment to interest income on non-accrual loans		549	$ 128	1,890	$ 536
Initial allowance on loans purchased with deteriorated credit quality		7,518		7,518
Southern States Bancshares, Inc.
Financing Receivable, Past Due [Line Items]
Increase in allowance for credit losses	$ 32,641
Allowance for credit losses on PCD loans	(7,518)
Initial allowance on loans purchased with deteriorated credit quality	$ 25,123
Consumer and other
Financing Receivable, Past Due [Line Items]
Initial allowance on loans purchased with deteriorated credit quality		74		74
Consumer and other | Term Extension
Financing Receivable, Past Due [Line Items]
Loans receivable, defaulted after modification in prior 12 months			$ 32	0	$ 32
Commercial and Industrial Loan | Federal Reserve Bank
Financing Receivable, Past Due [Line Items]
Deposit liabilities, collateral issued, financial instruments		2,777,841		2,777,841		2,561,352
FHLB Cincinnati | Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Collateral securing line of credit		946,552		946,552		988,177
FHLB Cincinnati | Commercial Loan
Financing Receivable, Past Due [Line Items]
Collateral securing line of credit		$ 1,762,269		$ 1,762,269		$ 1,620,510