Revenue from Contracts with Customers (Disaggregation of Revenue by Source) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 40,834	$ 38,722	$ 120,281	$ 114,313
Mortgage broker fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	235	295	608	862
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	9,972	9,331	28,097	27,339
Administrative services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,086	1,099	3,125	3,365
Card related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,220	2,328	6,932	5,583
Other deposit related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,322	3,035	9,404	8,927
Wealth management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	23,999	22,634	72,115	68,237
Wealth management | Brokerage and insurance product commissions
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,686	5,579	13,966	17,394
Wealth management | Trust
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,399	3,003	14,366	9,646
Wealth management | Asset management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 14,914	$ 14,052	$ 43,783	$ 41,197