Loans and Allowance for Credit Losses on Loans - Credit Quality Classification (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Loans
Total	$ 2,696,024		$ 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	878,393	$ 6,790
Commercial | Commercial
Loans
Total	878,393		603,345
Commercial | Commercial | Nonclassified
Loans
Total			599,143
Commercial | Commercial | Classified
Loans
Total			4,202
CRE - owner occupied
Loans
Total	553,463	6,994
CRE - owner occupied | Real estate
Loans
Total	553,463		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	725,776	11,672	767,821
CRE - non-owner occupied | Real estate
Loans
Total	725,776		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	138,284	1,458
Land and construction | Real estate
Loans
Total	138,284		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	112,679	1,321
Home equity | Real estate
Loans
Total	112,679		151,775
Home equity | Real estate | Nonclassified
Loans
Total			149,131
Home equity | Real estate | Classified
Loans
Total			2,644
Multi-family
Loans
Total	169,637	1,253
Multi-family | Real estate
Loans
Total	169,637		180,623
Multi-family | Real estate | Nonclassified
Loans
Total			180,623
Residential mortgages
Loans
Total	95,033	678
Residential mortgages | Real estate
Loans
Total	95,033		100,759
Residential mortgages | Real estate | Nonclassified
Loans
Total			100,262
Residential mortgages | Real estate | Classified
Loans
Total			497
Consumer and other
Loans
Total	22,759	$ 1,689
Consumer and other | Consumer
Loans
Total	$ 22,759		33,744
Consumer and other | Consumer | Nonclassified
Loans
Total			28,287
Consumer and other | Consumer | Classified
Loans
Total			$ 5,457