Revenue from Contracts with Customers (Disaggregation of Revenue by Source) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 47,768	$ 43,655
Brokerage and insurance product commissions
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,040	5,281
Trust
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,017	5,291
Asset management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	19,252	15,369
Wealth management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	29,309	25,941
Mortgage broker fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	76	53
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	12,036	11,265
Administrative services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,256	1,112
Card related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,774	2,106
Other deposit related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 3,317	$ 3,178