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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements - Additional Information (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
segment
investment
branch
tranch
Dec. 31, 2020
USD ($)
Business Description and Basis of Presentation [Line Items]    
Total contractual lease payments $ 25,000  
Number of equity investments | investment 2  
Number of certified development entities | tranch 3  
Required funding percentage 85.00%  
Number of operating segments | segment 1  
Minimum | Building and Building Improvements    
Business Description and Basis of Presentation [Line Items]    
Useful lives 15 years  
Minimum | Furniture, fixtures and equipment    
Business Description and Basis of Presentation [Line Items]    
Useful lives 3 years  
Maximum | Building and Building Improvements    
Business Description and Basis of Presentation [Line Items]    
Useful lives 39 years  
Maximum | Furniture, fixtures and equipment    
Business Description and Basis of Presentation [Line Items]    
Useful lives 7 years  
Heritage Bank    
Business Description and Basis of Presentation [Line Items]    
Number of branches operating | branch 49  
Investment Tax Credit Carryforward | Subsidiaries    
Business Description and Basis of Presentation [Line Items]    
Qualified equity investments $ 25,000,000 $ 9,800,000