Revenue from Contracts with Customers (Disaggregation of Revenue by Source) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 40,065	$ 37,411	$ 79,447	$ 75,591
Mortgage broker fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	191	288	373	567
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	9,277	9,151	18,125	18,008
Administrative services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,009	1,205	2,039	2,266
Card related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,156	1,116	4,712	3,255
Other deposit related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,293	3,034	6,082	5,892
Wealth management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	24,139	22,617	48,116	45,603
Wealth management | Brokerage and insurance product commissions
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,764	5,784	9,280	11,815
Wealth management | Trust
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,640	3,226	9,967	6,643
Wealth management | Asset management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 14,735	$ 13,607	$ 28,869	$ 27,145