Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	$ 137,098	$ 155,990	$ 141,435
Provision for credit losses		3,200	(1,300)	(4,822)
Net interest income after provision for credit losses		133,898	157,290	146,257
Noninterest income	[1]	56,140	62,602	87,394
Depreciation and amortization expense		4,848	4,325	4,301
Other noninterest expenses		128,709	124,397	131,163
Noninterest expense		133,557	128,722	135,464
Income before income taxes		56,481	91,170	98,187
Income tax expense		8,305	19,489	21,317
Net income		48,176	71,681	76,870
Total assets		7,202,847	6,660,051	5,851,127
Expenditures for long-lived assets		5,048	6,139	3,490
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		137,061	156,040	141,493
Provision for credit losses		3,200	(1,300)	(4,822)
Net interest income after provision for credit losses		133,861	157,340	146,315
Noninterest income		20,006	23,088	44,748
Depreciation and amortization expense		3,460	2,948	2,827
Other noninterest expenses		99,506	94,025	101,029
Noninterest expense		102,966	96,973	103,856
Income before income taxes		50,901	83,455	87,207
Income tax expense		7,028	17,557	18,575
Net income		43,873	65,898	68,632
Total assets		7,146,096	6,585,310	5,776,754
Expenditures for long-lived assets		5,013	5,475	3,246
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		37	(50)	(58)
Provision for credit losses		0	0	0
Net interest income after provision for credit losses		37	(50)	(58)
Noninterest income		36,134	39,514	42,646
Depreciation and amortization expense		1,388	1,377	1,474
Other noninterest expenses		29,203	30,372	30,134
Noninterest expense		30,591	31,749	31,608
Income before income taxes		5,580	7,715	10,980
Income tax expense		1,277	1,932	2,742
Net income		4,303	5,783	8,238
Total assets		56,751	74,741	74,373
Expenditures for long-lived assets		$ 35	$ 664	$ 244

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