Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from contracts in scope of Topic 606		$ 10,441	$ 11,867	$ 21,184	$ 23,215
Wealth Management Revenues
Revenue from contracts in scope of Topic 606	[1]	8,605	9,549	17,294	18,801
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		8,605	9,549	17,294	18,801
Card Interchange Fees
Revenue from contracts in scope of Topic 606	[1]	1,031	1,018	1,978	2,015
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		1,031	1,018	1,978	2,015
Service Charges on Deposit Accounts
Revenue from contracts in scope of Topic 606	[1]	517	929	1,377	1,804
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		374	719	1,041	1,381
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		143	210	336	423
Other Income
Revenue from contracts in scope of Topic 606	[1]	288	371	535	595
Other Income | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		254	324	454	503
Other Income | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		$ 34	$ 47	$ 81	$ 92

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