Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net interest income	$ 34,584	$ 31,852
Asset-based wealth management revenues	8,921	9,955
Transaction-based wealth management revenues	331	318
Total wealth management revenues	9,252	10,273
Mortgage banking revenues	2,646	2,838
Card interchange fees	997	847
Service charges on deposit accounts	875	863
Loan related derivative income	724	141
Income from bank-owned life insurance	649	515
Other income	224	266
Total noninterest income	15,367	15,743
Total revenues	49,951	47,595
Revenue from Contracts with Customers [Member]
Net interest income	0	0
Asset-based wealth management revenues	8,921	9,955
Transaction-based wealth management revenues	331	318
Total wealth management revenues	9,252	10,273
Mortgage banking revenues	0	0
Card interchange fees	997	847
Service charges on deposit accounts	875	863
Loan related derivative income	0	0
Income from bank-owned life insurance	0	0
Other income	224	266
Total noninterest income	11,348	12,249
Total revenues	$ 11,348	$ 12,249