Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 478
Revenue not from contracts with customers	730	$ 3,666
Total Noninterest Income	5,334	8,094
Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,585	4,413
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	19	15
Debit card interchange income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,118	990
Overdraft charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,109	1,153
ATM service charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	190	162
Demand deposit fees and charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	158	136
Savings service charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	36	14
Deposit Related Fees and Charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,611	2,455
Loan and lease fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	322	236
Wire transfer charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	248	227
Investment services income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	228	241
Merchant fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	216	242
Commissions from sales of checks
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	108	117
Safe deposit income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	84	64
Other income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	63	23
Commissions and Fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,269	1,150
Gains on Sale of Loans
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	246	398
Gains on customer swap transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	332	359
Title insurance income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	49	28
Other income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 97	38
Other Income, Total
Disaggregation of Revenue [Line Items]
Revenue from contract with customer		$ 425