Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Non-interest Income
Service charges on deposit accounts	$ 1,584	$ 1,244	$ 4,102	$ 3,499
Wealth and asset management fees	1,031	952	3,151	2,775
Mortgage banking	283	237	801	668
Card processing and interchange income	1,066	942	3,140	2,790
Net realized gains on available-for-sale securities	0	5	0	1,543
Other income	1,969	1,652	5,096	4,619
Total non-interest income	$ 5,933	$ 5,032	$ 16,290	$ 15,894