Loans and Allowance for Credit Losses on Loans - Credit Quality Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Loans
Total	$ 2,625,987	$ 31,855	$ 2,534,163
Nonclassified
Loans
Total			2,501,584
Classified
Loans
Total			32,579
Commercial
Loans
Total			603,345
Real estate
Loans
Total			1,897,074
Consumer
Loans
Total			33,744
Commercial
Loans
Total	846,386	6,790	603,345
Commercial | Commercial
Loans
Total	846,386		603,345
Commercial | Commercial | Nonclassified
Loans
Total			599,143
Commercial | Commercial | Classified
Loans
Total			4,202
CRE - owner occupied
Loans
Total	560,362	6,994	548,907
CRE - owner occupied | Real estate
Loans
Total	560,362		548,907
CRE - owner occupied | Real estate | Nonclassified
Loans
Total			538,229
CRE - owner occupied | Real estate | Classified
Loans
Total			10,678
CRE - non-owner occupied
Loans
Total	693,103	11,672	767,821
CRE - non-owner occupied | Real estate
Loans
Total	693,103		767,821
CRE - non-owner occupied | Real estate | Nonclassified
Loans
Total			761,801
CRE - non-owner occupied | Real estate | Classified
Loans
Total			6,020
Land and construction
Loans
Total	144,594	1,458	147,189
Land and construction | Real estate
Loans
Total	144,594		147,189
Land and construction | Real estate | Nonclassified
Loans
Total			144,108
Land and construction | Real estate | Classified
Loans
Total			3,081
Home equity
Loans
Total	111,885	1,321	151,775
Home equity | Real estate
Loans
Total	111,885		151,775
Home equity | Real estate | Nonclassified
Loans
Total			149,131
Home equity | Real estate | Classified
Loans
Total			2,644
Multi-family
Loans
Total	166,425	1,253	180,623
Multi-family | Real estate
Loans
Total	166,425		180,623
Multi-family | Real estate | Nonclassified
Loans
Total			180,623
Residential mortgages
Loans
Total	85,116	678	100,759
Residential mortgages | Real estate
Loans
Total	85,116		100,759
Residential mortgages | Real estate | Nonclassified
Loans
Total			100,262
Residential mortgages | Real estate | Classified
Loans
Total			497
Consumer and other
Loans
Total	18,116	$ 1,689	33,744
Consumer and other | Consumer
Loans
Total	$ 18,116		33,744
Consumer and other | Consumer | Nonclassified
Loans
Total			28,287
Consumer and other | Consumer | Classified
Loans
Total			$ 5,457