Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net interest income	$ 33,858	$ 33,111	$ 68,442	$ 64,963
Asset-based wealth management revenues	9,141	9,136	18,062	19,091
Transaction-based wealth management revenues	408	466	739	784
Total wealth management revenues	9,549	9,602	18,801	19,875
Mortgage banking revenues	3,640	2,941	6,286	5,779
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	929	903	1,804	1,766
Loan related derivative income	746	668	1,470	809
Income from bank-owned life insurance	566	537	1,215	1,052
Net realized losses on securities	(80)	0	(80)	0
Other income	385	381	609	647
Total noninterest income	16,753	15,993	32,120	31,736
Total revenues	50,611	49,104	100,562	96,699
Revenue from Contracts with Customers [Member]
Net interest income	0	0	0	0
Asset-based wealth management revenues	9,141	9,136	18,062	19,091
Transaction-based wealth management revenues	408	466	739	784
Total wealth management revenues	9,549	9,602	18,801	19,875
Mortgage banking revenues	0	0	0	0
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	929	903	1,804	1,766
Loan related derivative income	0	0	0	0
Income from bank-owned life insurance	0	0	0	0
Net realized losses on securities	0	0	0	0
Other income	371	366	595	632
Total noninterest income	11,867	11,832	23,215	24,081
Total revenues	$ 11,867	$ 11,832	$ 23,215	$ 24,081