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Significant Accounting Policies - Cumulative Effect Adjustment to Retained Earnings (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		$ 37,520
Reserve for off-balance sheet exposures		1,810
Municipal securities		0
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	$ 1,248
Reserve for off-balance sheet exposures	(381)
Municipal securities	96
Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	38,768
Reserve for off-balance sheet exposures	1,429
Municipal securities	96
Real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		20,056
Real estate | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	(6,437)
Real estate | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	13,619
Real estate | Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		10,013
Real estate | Commercial real estate | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	(5,052)
Real estate | Commercial real estate | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	4,961
Real estate | Construction/land/land development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		3,711
Real estate | Construction/land/land development | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	1,141
Real estate | Construction/land/land development | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	4,852
Real estate | Residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		6,332
Real estate | Residential real estate | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	(2,526)
Real estate | Residential real estate | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	3,806
Commercial and industrial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		16,960
Commercial and industrial | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	7,296
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	24,256
Mortgage warehouse lines of credit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		262
Mortgage warehouse lines of credit | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	29
Mortgage warehouse lines of credit | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	291
Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		$ 242
Consumer | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	360
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses	$ 602

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