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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements (Details)
$ in Thousands
 1 Months Ended
Jul. 31, 2021
Branch
branch
Jun. 30, 2021
branch
Jan. 01, 2020
USD ($)
Subsequent Event      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of Branches Consolidated | Branch 4    
Heritage Bank [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of Branches Operating | branch   53  
Heritage Bank [Member] | Subsequent Event      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of Branches Operating | branch 49    
Accounting Standards Update 2016-13 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative Effect of New Accounting Principle in Period of Adoption     $ 5,600
Cumulative Effect Of New Accounting Principle In Period Of Adoption PreTax     7,100
Unused Commitments to Extend Credit [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative Effect of New Accounting Principle in Period of Adoption     3,700
Total Allowance for Credit Losses [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative Effect of New Accounting Principle in Period of Adoption     $ 3,400