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	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non–accrual	$ 22,142	$ 15,679
Loans Past Due Over 90 Days Still Accruing	262	146
Non–performing TDRs	2,610	2,006
Performing TDRs	1,793	3,354
Total Non–performing Loans	26,807	21,185
Non–performing Loans with no Allowance for Credit Losses	19,821	15,909
Commercial
Financing Receivable, Past Due [Line Items]
Non–accrual	12,714	4,782
Loans Past Due Over 90 Days Still Accruing	0	0
Non–performing TDRs	1,466	1,081
Performing TDRs	168	1,484
Total Non–performing Loans	14,348	7,347
Non–performing Loans with no Allowance for Credit Losses	8,789	4,087
Commercial | Owner occupied real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	10,581	2,424
Loans Past Due Over 90 Days Still Accruing	0	0
Non–performing TDRs	630	629
Performing TDRs	168	139
Total Non–performing Loans	11,379	3,192
Non–performing Loans with no Allowance for Credit Losses	6,305	2,563
Commercial | Non–owner occupied real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	237	682
Loans Past Due Over 90 Days Still Accruing	0	0
Non–performing TDRs	330	374
Performing TDRs	0	0
Total Non–performing Loans	567	1,056
Non–performing Loans with no Allowance for Credit Losses	567	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
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–performing Loans 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
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	70	73
Non–performing Loans with no Allowance for Credit Losses	70	73
Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non–accrual	1,826	1,603
Loans Past Due Over 90 Days Still Accruing	0	0
Non–performing TDRs	506	78
Performing TDRs	0	1,345
Total Non–performing Loans	2,332	3,026
Non–performing Loans with no Allowance for Credit Losses	1,847	514
Real estate
Financing Receivable, Past Due [Line Items]
Non–accrual	5,674	7,614
Loans Past Due Over 90 Days Still Accruing	17	1
Non–performing TDRs	922	708
Performing TDRs	1,381	1,561
Total Non–performing Loans	7,994	9,884
Non–performing Loans with no Allowance for Credit Losses	7,097	8,322
Real estate | Residential mortgage
Financing Receivable, Past Due [Line Items]
Non–accrual	5,674	7,614
Loans Past Due Over 90 Days Still Accruing	17	1
Non–performing TDRs	922	708
Performing TDRs	1,381	1,561
Total Non–performing Loans	7,994	9,884
Non–performing Loans with no Allowance for Credit Losses	7,097	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
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–performing Loans 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
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	0	0
Non–performing Loans with no Allowance for Credit Losses	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Non–accrual	3,754	3,283
Loans Past Due Over 90 Days Still Accruing	245	145
Non–performing TDRs	222	217
Performing TDRs	244	309
Total Non–performing Loans	4,465	3,954
Non–performing Loans with no Allowance for Credit Losses	3,935	3,500
Consumer | Direct installment
Financing Receivable, Past Due [Line Items]
Non–accrual	12	30
Loans Past Due Over 90 Days Still Accruing	1	5
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	13	35
Non–performing Loans with no Allowance for Credit Losses	13	30
Consumer | Indirect installment
Financing Receivable, Past Due [Line Items]
Non–accrual	1,174	1,234
Loans Past Due Over 90 Days Still Accruing	120	135
Non–performing TDRs	0	0
Performing TDRs	0	0
Total Non–performing Loans	1,294	1,369
Non–performing Loans with no Allowance for Credit Losses	1,294	1,234
Consumer | Home equity
Financing Receivable, Past Due [Line Items]
Non–accrual	2,568	2,019
Loans Past Due Over 90 Days Still Accruing	124	5
Non–performing TDRs	222	217
Performing TDRs	244	309
Total Non–performing Loans	3,158	2,550
Non–performing Loans with no Allowance for Credit Losses	$ 2,628	$ 2,236