Allowance for Credit and Loan Losses - Actual Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				$ 17,667				$ 17,820	$ 17,667	$ 17,820	$ 16,394
Total loans charged-off										3,268	2,552
Total loan recoveries										1,139	1,072
Net loans charged-off										2,129	1,480
Provision for loan losses	$ 3,042	$ 2,052	$ 7,057	8,600	$ 340	$ 376	$ 896	$ 364	20,751	1,976	2,906
Balance at the end of the period	$ 57,027				17,667				57,027	17,667	17,820
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										863	473
Total loan recoveries										199	176
Provision for loan losses										2,165	1,699
Commercial | Owner occupied real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										41	109
Total loan recoveries										0	55
Commercial | Non–owner occupied real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										64	0
Total loan recoveries										15	33
Commercial | Residential spec homes
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										3	0
Total loan recoveries										5	8
Commercial | Development & spec land
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										0	0
Total loan recoveries										0	0
Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										755	364
Total loan recoveries										179	80
Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										93	76
Total loan recoveries										46	27
Provision for loan losses										(635)	(487)
Real estate | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										93	76
Total loan recoveries										46	27
Real estate | Residential construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										0	0
Total loan recoveries										0	0
Real estate | Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										0	0
Total loan recoveries										0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										2,312	2,003
Total loan recoveries										894	869
Provision for loan losses										446	1,694
Consumer | Direct installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										208	154
Total loan recoveries										97	53
Consumer | Indirect installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										1,785	1,673
Total loan recoveries										661	505
Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans charged-off										319	176
Total loan recoveries										136	$ 311
Allowance For Loan Losses
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				17,667					17,667
Balance at the end of the period					17,667					17,667
Allowance For Loan Losses | Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				1,077					1,077
Balance at the end of the period					1,077					1,077
Allowance For Loan Losses | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				11,996					11,996
Balance at the end of the period					11,996					11,996
Allowance For Loan Losses | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				923					923
Balance at the end of the period					923					923
Allowance For Loan Losses | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of the period				$ 3,671					$ 3,671
Balance at the end of the period					$ 3,671					$ 3,671