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Capital and Regulatory Matters - Narrative (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Resale Agreement Counterparty [Line Items]          
Benefit to capital risk-weighted assets capital ratio, basis point     0.0014    
Repurchase of common stock (in shares) | shares 37,568 0      
Buyback program at a price per share (in dollars per share) | $ / shares $ 33.42        
Repurchase of common stock, value $ 1,300   $ 1,256 $ 723 $ 10,059
Stock repurchase, cumulative shares (in shares) | shares       330,868  
Stock repurchase, cumulative value       $ 10,800  
Repurchased amount   $ 28,000 28,000    
Origin Bank | Origin Bank          
Resale Agreement Counterparty [Line Items]          
Aggregate dividends without prior regulatory approval   $ 110,800 $ 110,800