Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from contracts in scope of Topic 606	$ 10,743	$ 11,348
Wealth Management Revenues
Revenue from contracts in scope of Topic 606	8,689	9,252
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606	8,689	9,252
Card Interchange Fees
Revenue from contracts in scope of Topic 606	947	997
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606	947	997
Service Charges on Deposit Accounts
Revenue from contracts in scope of Topic 606	860	875
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606	667	662
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606	193	213
Other Income
Revenue from contracts in scope of Topic 606	247	224
Other Income | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606	200	179
Other Income | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606	$ 47	$ 45