Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Deposit Related Fees and Charges [Abstract]
Debit card interchange income	$ 1,280	$ 1,138	$ 3,675	$ 3,274
Overdraft charges	966	1,181	2,975	3,479
ATM service charges	220	235	627	596
Demand deposit fees and charges	119	199	398	493
Savings service charges	29	44	95	84
Total	2,614	2,797	7,770	7,926
Commissions and Fees
Loans, leases and fees	267	310	952	745
Wire transfer charges	291	263	813	736
Investment services income	378	267	917	804
Merchant fees	199	159	589	564
Commissions from sales of checks	106	112	326	345
Safe deposit income	92	67	280	194
Other income	77	73	205	140
Total	1,410	1,251	4,082	3,528
Gains on sales of loans	484	478	1,030	1,347
Other Income
Gains on customer swap transactions	319	(3)	1,178	811
Other income	48	59	203	474
Total	394	106	1,530	1,438
Title insurance income	27	50	149	153
Revenue not from contracts with customers	737	822	2,270	5,420
TOTAL NONINTEREST INCOME	5,639	5,454	16,682	19,659
Products and services transferred at a point in time
Other Income
Revenue from contract with customer	4,883	4,613	14,356	14,190
Products and services transferred over time
Other Income
Revenue from contract with customer	$ 19	$ 19	$ 56	$ 49