Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from contracts in scope of Topic 606		$ 11,204	$ 11,514	$ 32,388	$ 34,728
Wealth Management Revenues
Revenue from contracts in scope of Topic 606	[1]	8,954	9,153	26,248	27,954
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		8,954	9,153	26,248	27,954
Card Interchange Fees
Revenue from contracts in scope of Topic 606	[1]	1,161	1,099	3,139	3,114
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		1,161	1,099	3,139	3,114
Service Charges on Deposit Accounts
Revenue from contracts in scope of Topic 606	[1]	598	939	1,975	2,743
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		447	728	1,488	2,109
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		151	211	487	634
Other Income
Revenue from contracts in scope of Topic 606	[1]	491	323	1,026	917
Other Income | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		441	268	895	771
Other Income | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		$ 50	$ 55	$ 131	$ 146

[1] Revenue from contracts with customers in scope of ASC 606.