Allowance for Credit Losses - Amortized Cost Basis of Collateral Dependent Loans, By Class of Loan (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 4,763,127	$ 4,307,366
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,241	2,506
Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,611	163
Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,668	1,640
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	334	620
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	2,060
Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,538	1,242
SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,470	5,341
SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,839	3,848
Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	97	27
A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,186	1,952
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	80	1,026
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	24,064	20,425
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,951,902	2,818,782
Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,241	2,506
Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,611	163
Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,668	1,640
Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	510
Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	2,060
Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,538	1,242
Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		1,000
Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8,058	9,121
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	952,108	955,050
Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	42	3
Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,923	5,341
Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,839	3,848
Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	97	27
Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,901	9,219
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	526,327	249,791
Commercial and industrial | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	292	107
Commercial and industrial | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,173	1,926
Commercial and industrial | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	75	14
Commercial and industrial | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,540	2,047
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	284,842	249,827
Construction | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,547	0
Construction | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,547	0
Agriculture production
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	44,164	32,633
Agriculture production | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	13	26
Agriculture production | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5	12
Agriculture production | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18	38
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,784	1,283
Leases | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,535,555	1,609,556
CRE non-owner occupied | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,445	2,145
CRE non-owner occupied | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	435	0
CRE non-owner occupied | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	1,220
CRE non-owner occupied | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	497
CRE non-owner occupied | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,880	3,862
CRE owner occupied | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	624,375	546,434
CRE owner occupied | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	796	361
CRE owner occupied | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,176	163
CRE owner occupied | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,668	420
CRE owner occupied | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	13
CRE owner occupied | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	1,000
CRE owner occupied | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,640	1,957
Multifamily | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	639,480	517,725
Multifamily | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	2,060
Multifamily | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	2,060
Farmland | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	152,492	145,067
Farmland | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,538	1,242
Farmland | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,538	1,242
SFR 1-4 1st DT liens | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	546,592
SFR 1-4 1st DT liens | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		509,508
SFR 1-4 1st DT liens | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,068	5,341
SFR 1-4 1st DT liens | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,068	5,341
SFR HELOCs and junior liens | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	327,484	362,886
SFR HELOCs and junior liens | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,855	0
SFR HELOCs and junior liens | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,839	3,848
SFR HELOCs and junior liens | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,694	3,848
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	78,032	82,656
Other | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	42	3
Other | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	97	27
Other | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 139	$ 30