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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Jan. 01, 2020
Dec. 31, 2019
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit $ 1,054,050   $ 1,054,050     $ 1,105,425      
Allowance for credit losses on loans 48,317 $ 73,340 48,317 $ 73,340 $ 51,562 70,185 $ 71,501 $ 37,993 $ 36,171
Cumulative Effect, Period of Adoption, Adjustment                  
Other Commitments [Line Items]                  
Allowance for credit losses on loans           0     1,822
Cumulative Effect, Period of Adoption, Adjusted Balance                  
Other Commitments [Line Items]                  
Allowance for credit losses on loans           70,185     37,993
Commercial Portfolio Segment                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 587,128   587,128     661,902      
Allowance for credit losses on loans 35,073 54,733 35,073 54,733 36,677 49,608 50,442 20,998  
Commercial Portfolio Segment | Commercial and Industrial                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 577,284   577,284     640,018      
Allowance for credit losses on loans 18,646 31,159 18,646 31,159 17,485 30,010 29,773 10,391  
Commercial Portfolio Segment | Owner Occupied Commercial Real Estate                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 1,533   1,533     3,488      
Allowance for credit losses on loans 6,930 13,032 6,930 13,032 8,562 9,486 10,003 4,964  
Commercial Portfolio Segment | Non Owner Occupied Commercial Real Estate                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 8,311   8,311     18,396      
Allowance for credit losses on loans 9,497 10,542 9,497 10,542 10,630 10,112 10,666 5,643  
Real Estate Construction and Land Development                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 184,072   184,072     180,274      
Allowance for credit losses on loans 9,085 9,291 9,085 9,291 10,471 13,092 9,124 9,729  
Real Estate Construction and Land Development | One to Four Family Real Estate Construction                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 46,911   46,911     52,453      
Allowance for credit losses on loans 1,780 664 1,780 664 1,636 1,951 567 884  
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 137,161   137,161     127,821      
Allowance for credit losses on loans 7,305 8,627 7,305 8,627 8,835 11,141 8,557 8,845  
Consumer Portfolio Segment                  
Other Commitments [Line Items]                  
Unused Commitments to Extend Credit 282,850   282,850     263,249      
Allowance for credit losses on loans 3,073 7,491 3,073 7,491 3,261 5,894 9,712 4,337  
Unused Commitments to Extend Credit                  
Other Commitments [Line Items]                  
Provision for Other Credit Losses (297) 410 (2,527) 1,014          
Allowance for credit losses on loans $ 2,154 $ 5,022 $ 2,154 $ 5,022 2,451 4,681 4,612   306
Unused Commitments to Extend Credit | Accounting Standards Update 2016-13                  
Other Commitments [Line Items]                  
Allowance for credit losses on loans               $ 3,700  
Unused Commitments to Extend Credit | Cumulative Effect, Period of Adoption, Adjustment                  
Other Commitments [Line Items]                  
Allowance for credit losses on loans         0 0 0   3,702
Unused Commitments to Extend Credit | Cumulative Effect, Period of Adoption, Adjusted Balance                  
Other Commitments [Line Items]                  
Allowance for credit losses on loans         $ 2,451 $ 4,681 $ 4,612   $ 4,008