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Capital and Regulatory Matters - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2025	Jul. 31, 2022
Resale Agreement Counterparty [Line Items]
Stock repurchase program, authorized amount	$ 50,000,000				$ 50,000,000
Stock buyback program, period	3 years
Repurchase of stock (in shares)		265,248	136,399	401,647
Buyback program at a price per share (in dollars per share)		$ 35.85	$ 32.13	$ 34.59
Repurchase of common stock		$ 9,500,000	$ 4,400,000	$ 13,900,000
Origin Bank | Origin Bank
Resale Agreement Counterparty [Line Items]
Aggregate dividends without prior regulatory approval		$ 12,800,000		$ 12,800,000

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