Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Deposit Related Fees and Charges [Abstract]
Debit card interchange income	$ 1,277	$ 1,146	$ 2,395	$ 2,136
Overdraft charges	900	1,145	2,009	2,298
ATM service charges	217	199	407	361
Demand deposit fees and charges	121	158	279	294
Savings service charges	30	26	66	40
Total	2,545	2,674	5,156	5,129
Commissions and Fees
Loans, leases and fees	363	199	685	435
Wire transfer charges	274	246	522	473
Investment services income	311	296	539	537
Merchant fees	174	163	390	405
Commissions from sales of checks	112	116	220	233
Safe deposit income	104	63	188	127
Other income	65	44	128	67
Total	1,403	1,127	2,672	2,277
Gains on sales of loans	300	471	546	869
Other Income
Gains on customer swap transactions	527	455	859	814
Other income	58	377	155	415
Total	658	907	1,136	1,332
Title insurance income	73	75	122	103
Revenue not from contracts with customers	803	932	1,533	4,598
TOTAL NONINTEREST INCOME	5,709	6,111	11,043	14,205
Products and services transferred at a point in time
Other Income
Revenue from contract with customer	4,888	5,164	9,473	9,577
Products and services transferred over time
Other Income
Revenue from contract with customer	$ 18	$ 15	$ 37	$ 30