Non-performing Loans - Non-accrual, Loans Past Due Over 90 Days Still on Accrual, and Troubled Debt Restructured ("TDRs") by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non–accrual	$ 24,454	$ 15,679
Loans Past Due Over 90 Days Still Accruing	331	146
TDR loans	2,704	2,006
Performing TDRs	1,825	3,354
Total Non–performing Loans	29,314	21,185
Non–accrual with no Allowance for Credit Losses	22,897	15,909
Commercial
Financing Receivable, Past Due [Line Items]
Non–accrual	14,508	4,782
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	1,492	1,081
Performing TDRs	169	1,484
Total Non–performing Loans	16,169	7,347
Non–accrual with no Allowance for Credit Losses	11,739	4,087
Commercial | Owner occupied real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	11,105	2,424
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	629	629
Performing TDRs	169	139
Total Non–performing Loans	11,903	3,192
Non–accrual with no Allowance for Credit Losses	8,715	2,563
Commercial | Non–owner occupied real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	1,181	682
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	340	374
Performing TDRs	0	0
Total Non–performing Loans	1,521	1,056
Non–accrual with no Allowance for Credit Losses	1,033	937
Commercial | Residential spec homes
Financing Receivable, Past Due [Line Items]
Non–accrual	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–accrual with no Allowance for Credit Losses	0	0
Commercial | Development & spec land
Financing Receivable, Past Due [Line Items]
Non–accrual	70	73
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	70	73
Non–accrual with no Allowance for Credit Losses	70	73
Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non–accrual	2,152	1,603
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	523	78
Performing TDRs	0	1,345
Total Non–performing Loans	2,675	3,026
Non–accrual with no Allowance for Credit Losses	1,921	514
Real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	6,606	7,614
Loans Past Due Over 90 Days Still Accruing	205	1
TDR loans	988	708
Performing TDRs	1,410	1,561
Total Non–performing Loans	9,209	9,884
Non–accrual with no Allowance for Credit Losses	7,594	8,322
Real estate | Residential mortgage
Financing Receivable, Past Due [Line Items]
Non–accrual	6,606	7,614
Loans Past Due Over 90 Days Still Accruing	205	1
TDR loans	988	708
Performing TDRs	1,410	1,561
Total Non–performing Loans	9,209	9,884
Non–accrual with no Allowance for Credit Losses	7,594	8,322
Real estate | Residential construction
Financing Receivable, Past Due [Line Items]
Non–accrual	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–accrual with no Allowance for Credit Losses	0	0
Real estate | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Non–accrual	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–accrual with no Allowance for Credit Losses	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Non–accrual	3,340	3,283
Loans Past Due Over 90 Days Still Accruing	126	145
TDR loans	224	217
Performing TDRs	246	309
Total Non–performing Loans	3,936	3,954
Non–accrual with no Allowance for Credit Losses	3,564	3,500
Consumer | Direct installment
Financing Receivable, Past Due [Line Items]
Non–accrual	23	30
Loans Past Due Over 90 Days Still Accruing	0	5
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	23	35
Non–accrual with no Allowance for Credit Losses	23	30
Consumer | Indirect installment
Financing Receivable, Past Due [Line Items]
Non–accrual	1,122	1,234
Loans Past Due Over 90 Days Still Accruing	69	135
TDR loans	0	0
Performing TDRs	0	0
Total Non–performing Loans	1,191	1,369
Non–accrual with no Allowance for Credit Losses	1,122	1,234
Consumer | Home equity
Financing Receivable, Past Due [Line Items]
Non–accrual	2,195	2,019
Loans Past Due Over 90 Days Still Accruing	57	5
TDR loans	224	217
Performing TDRs	246	309
Total Non–performing Loans	2,722	2,550
Non–accrual with no Allowance for Credit Losses	$ 2,419	$ 2,236