Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Card interchange fees	$ 997	$ 847
Service charges on deposit accounts	875	863
Wealth management revenues	9,252	10,273
Other income	224	266
Total revenues	49,951	47,595
Revenue from Contracts with Customers [Member]
Card interchange fees	997	847
Service charges on deposit accounts	875	863
Wealth management revenues	9,252	10,273
Other income	224	266
Total revenues	11,348	12,249
Transferred at Point in Time [Member] | Revenue from Contracts with Customers [Member]
Card interchange fees	997	847
Service charges on deposit accounts	662	672
Other income	179	226
Transferred over Time [Member] | Revenue from Contracts with Customers [Member]
Service charges on deposit accounts	213	191
Wealth management revenues	9,252	10,273
Other income	$ 45	$ 40