Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net interest income	$ 31,852	$ 28,679
Asset-based wealth management revenues	9,955	9,247
Transaction-based wealth management revenues	318	230
Wealth management revenues	10,273	9,477
Mortgage banking revenues	2,838	2,340
Service charges on deposit accounts	863	883
Card interchange fees	847	802
Income from bank-owned life insurance	515	536
Loan related derivative income	141	148
Other income	266	324
Total noninterest income	15,743	14,510
Total revenues	47,595	43,189
Revenue from Contracts with Customers [Member]
Net interest income	0	0
Asset-based wealth management revenues	9,955	9,247
Transaction-based wealth management revenues	318	230
Wealth management revenues	10,273	9,477
Mortgage banking revenues	0	0
Service charges on deposit accounts	863	883
Card interchange fees	847	802
Income from bank-owned life insurance	0	0
Loan related derivative income	0	0
Other income	266	297
Total noninterest income	12,249	11,459
Total revenues	$ 12,249	$ 11,459