Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Card interchange fees	$ 1,018	$ 961	$ 2,015	$ 1,808
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	929	903	1,804	1,766
Other income	385	381	609	647
Total revenues	50,611	49,104	100,562	96,699
Revenue from Contracts with Customers [Member]
Card interchange fees	1,018	961	2,015	1,808
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	929	903	1,804	1,766
Other income	371	366	595	632
Total revenues	11,867	11,832	23,215	24,081
Transferred at Point in Time [Member] | Revenue from Contracts with Customers [Member]
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	719	703	1,381	1,375
Other income	324	248	503	474
Transferred over Time [Member] | Revenue from Contracts with Customers [Member]
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	210	200	423	391
Other income	$ 47	$ 118	$ 92	$ 158