Loans - Summary of Accruing Loans and TDRs (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	$ 22,079	$ 7,602
Accruing Delinquent 90 Days or More	6,313	6,189
TDRs Accruing	14,807	11,663
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	3,821	1,407
Accruing Delinquent 90 Days or More	5,722	4,231
TDRs Accruing	8,468	5,942
SBA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	5,560	1,452
Accruing Delinquent 90 Days or More	70	0
TDRs Accruing	3,800	3,788
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	0	32
Accruing Delinquent 90 Days or More	102	343
TDRs Accruing	0	0
Indirect automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	3,971	2,972
Accruing Delinquent 90 Days or More	87	0
TDRs Accruing	1,960	1,474
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	449	39
Accruing Delinquent 90 Days or More	0	26
TDRs Accruing	33	0
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	7,447	380
Accruing Delinquent 90 Days or More	268	1,577
TDRs Accruing	495	406
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Delinquent 30-89 Days	831	1,320
Accruing Delinquent 90 Days or More	64	12
TDRs Accruing	$ 51	$ 53