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Loans, Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 49,445	$ 35,096
Provision charged to expense	(49)	12,658	[1]
Losses charged off	(3,809)	(6,224)
Recoveries	1,047	2,064
Ending balance	46,634	46,634
Commercial [Member] | Hotel/Motel [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	5,922	3,371
Provision charged to expense	210	2,591
Losses charged off	0	0
Recoveries	0	0
Ending balance	6,132	6,132
Commercial [Member] | Commercial Real Estate Residential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	4,012	3,439
Provision charged to expense	(544)	794
Losses charged off	(35)	(86)
Recoveries	6	13
Ending balance	3,439	3,439
Commercial [Member] | Commercial Real Estate Nonresidential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	11,563	8,515
Provision charged to expense	(34)	2,950
Losses charged off	(128)	(187)
Recoveries	7	11
Ending balance	11,408	11,408
Commercial [Member] | Dealer Floorplans [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	1,713	802
Provision charged to expense	(102)	(11)
Losses charged off	(26)	(26)
Recoveries	0	0
Ending balance	1,585	1,585
Commercial [Member] | Commercial Other [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	6,409	5,556
Provision charged to expense	204	1,637
Losses charged off	(1,993)	(2,352)
Recoveries	83	253
Ending balance	4,703	4,703
Residential [Member] | Real Estate Mortgage [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	7,543	4,604
Provision charged to expense	(112)	987
Losses charged off	(119)	(179)
Recoveries	24	31
Ending balance	7,336	7,336
Residential [Member] | Home Equity Lines [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	890	897
Provision charged to expense	(35)	32
Losses charged off	0	0
Recoveries	1	2
Ending balance	856	856
Consumer [Member] | Consumer Direct [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	2,163	1,711
Provision charged to expense	(64)	673
Losses charged off	(261)	(630)
Recoveries	94	218
Ending balance	1,932	1,932
Consumer [Member] | Consumer Indirect [Member]
Allowance for Credit Losses [Roll Forward]
Beginning balance	9,230	6,201
Provision charged to expense	428	3,005
Losses charged off	(1,247)	(2,764)
Recoveries	832	1,536
Ending balance	$ 9,243	9,243
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Allowance for Credit Losses [Roll Forward]
Beginning 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
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)
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
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
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)
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
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)
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)
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
[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.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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