Revenue from Contracts with Customers (Disaggregation of Revenue) (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]
Net interest income	$ 32,978	$ 33,449	$ 101,420	$ 98,412
Asset-based wealth management revenues	9,013	9,322	27,075	28,413
Transaction-based wealth management revenues	140	132	879	916
Wealth management revenues	9,153	9,454	27,954	29,329
Mortgage banking revenues	4,840	2,624	11,126	8,403
Card interchange fees	1,099	983	3,114	2,791
Service charges on deposit accounts	939	885	2,743	2,651
Loan related derivative income	1,407	278	2,877	1,087
Income from bank-owned life insurance	569	572	1,784	1,624
Net realized losses on securities	0	0	(80)	0
Other income	335	419	944	1,066
Total noninterest income	18,342	15,215	50,462	46,951
Total revenues	51,320	48,664	151,882	145,363
Revenue from contracts in scope of Topic 606	11,514	11,741	34,728	35,822
Net Interest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	0	0	0	0
Asset-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	9,013	9,322	27,075	28,413
Transaction-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	140	132	879	916
Total Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	9,153	9,454	27,954	29,329
Mortgage Banking Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	0	0	0	0
Card Interchange Fees
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	1,099	983	3,114	2,791
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	939	885	2,743	2,651
Loan Related Derivative Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	0	0	0	0
Income From Bank-owned Life Insurance
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	0	0	0	0
Net Realized Gains (Losses) on Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	0	0	0	0
Other Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	323	419	917	1,051
Total Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	11,514	11,741	34,728	35,822
Total Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	$ 11,514	$ 11,741	$ 34,728	$ 35,822