Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	$ 35,091	$ 32,871
Provision for credit losses		100	(2,000)
Interest Income (Expense), after Provision for Loan Loss		34,991	34,871
Noninterest income	[1]	17,159	25,974
Depreciation and amortization expense		1,055	1,054
Other noninterest expenses related to segments		30,164	33,659
Noninterest Expense		31,219	34,713
Income (loss) before income taxes		20,931	26,132
Income tax expense		4,448	5,661
Net Income (Loss) Attributable to Parent		16,483	20,471
Total assets		5,847,999	5,719,389	$ 5,851,127
Expenditures for long-lived assets		834	911
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		35,108	32,885
Provision for credit losses		100	(2,000)
Interest Income (Expense), after Provision for Loan Loss		35,008	34,885
Noninterest income		6,512	14,990
Depreciation and amortization expense		711	677
Other noninterest expenses related to segments		22,611	26,564
Noninterest Expense		23,322	27,241
Income (loss) before income taxes		18,198	22,634
Income tax expense		3,797	4,835
Net Income (Loss) Attributable to Parent		14,401	17,799
Total assets		5,773,796	5,646,209
Expenditures for long-lived assets		730	835
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		(17)	(14)
Provision for credit losses		0	0
Interest Income (Expense), after Provision for Loan Loss		(17)	(14)
Noninterest income		10,647	10,984
Depreciation and amortization expense		344	377
Other noninterest expenses related to segments		7,553	7,095
Noninterest Expense		7,897	7,472
Income (loss) before income taxes		2,733	3,498
Income tax expense		651	826
Net Income (Loss) Attributable to Parent		2,082	2,672
Total assets		74,203	73,180
Expenditures for long-lived assets		$ 104	$ 76

[1] As reported in the Unaudited Consolidated Statements of Income.