Loans - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Net unearned discounts and deferred loan costs	$ 7,200,000		$ 7,200,000		$ 14,900,000
Nonaccrual interest income	0	$ 0	0	$ 0
Defaulted receivables	900,000	$ 0	3,700,000	$ 1,300,000
Repossessed assets	1,500,000		1,500,000
Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans with an aggregate credit exposure	3,000,000		$ 3,000,000
Loans classified as TDR after a period (in days)			90 days
Minimum | Good Pass
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of consecutive years of profit for good pass rating (in years)			3 years
Number of consecutive years of profit unaudited financial information for good pass rating (in years)			5 years
Number of years of satisfactory relationship with bank for good pass rating (in years)			5 years
Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans with an aggregate credit exposure	6,000,000		$ 6,000,000
Loans classified as TDR after a period (in days)			120 days
Maximum | Satisfactory Pass
Financing Receivable, Troubled Debt Restructuring [Line Items]
Minimum number of years of satisfactory repayment required for satisfactory pass rating (in years)			2 years
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Net investment in which foreclosure proceedings have commenced	$ 300,000		$ 300,000