Loans, Allowance for Credit Losses (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Credit Losses [Roll Forward]
Beginning balance		$ 35,096
Provision charged to expense	[1]	16,047	$ 4,819	$ 6,167
Losses charged off		(10,453)
Recoveries		4,292
Ending balance		48,022	35,096
Commercial [Member] | Hotel/Motel [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		3,371
Provision charged to expense		2,858
Losses charged off		(43)
Recoveries		0
Ending balance		6,356	3,371
Commercial [Member] | Commercial Real Estate Residential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		3,439
Provision charged to expense		1,772
Losses charged off		(182)
Recoveries		156
Ending balance		4,464	3,439
Commercial [Member] | Commercial Real Estate Nonresidential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		8,515
Provision charged to expense		3,303
Losses charged off		(941)
Recoveries		90
Ending balance		11,086	8,515
Commercial [Member] | Dealer Floorplans [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		802
Provision charged to expense		(214)
Losses charged off		(26)
Recoveries		0
Ending balance		1,382	802
Commercial [Member] | Commercial Other [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		5,556
Provision charged to expense		2,040
Losses charged off		(3,339)
Recoveries		423
Ending balance		4,289	5,556
Residential [Member] | Real Estate Mortgage [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		4,604
Provision charged to expense		1,584
Losses charged off		(321)
Recoveries		72
Ending balance		7,832	4,604
Residential [Member] | Home Equity Lines [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		897
Provision charged to expense		16
Losses charged off		(4)
Recoveries		10
Ending balance		844	897
Consumer [Member] | Consumer Direct [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		1,711
Provision charged to expense		609
Losses charged off		(927)
Recoveries		510
Ending balance		1,863	1,711
Consumer [Member] | Consumer Indirect [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		6,201
Provision charged to expense		4,079
Losses charged off		(4,670)
Recoveries		3,031
Ending balance		9,906	6,201
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		3,040
Ending balance			3,040
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial [Member] | Hotel/Motel [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		170
Ending balance			170
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial [Member] | Commercial Real Estate Residential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		(721)
Ending balance			(721)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial [Member] | Commercial Real Estate Nonresidential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		119
Ending balance			119
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial [Member] | Dealer Floorplans [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		820
Ending balance			820
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial [Member] | Commercial Other [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		(391)
Ending balance			(391)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Residential [Member] | Real Estate Mortgage [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		1,893
Ending balance			1,893
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Residential [Member] | Home Equity Lines [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		(75)
Ending balance			(75)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Consumer [Member] | Consumer Direct [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		(40)
Ending balance			(40)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Consumer [Member] | Consumer Indirect [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance		$ 1,265
Ending balance			$ 1,265

[1] Effective January 1, 2020, the provision for loan losses became the provision for credit losses with the implementation of ASU 2016-13, commonly referred to as CECL.