Loans And Allowance for Credit Losses (Credit Quality Indicators Personal Banking Loan Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Credit Quality Indicator [Line Items]
Loans charged off	$ 11,868	$ 8,838	$ 23,033	$ 17,886
Personal Banking Portfolio Segment [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	458,151		458,151		$ 984,834
Fiscal Year before Current Fiscal Year	863,820		863,820		794,378
Two Years before Current Fiscal Year	718,259		718,259		794,244
Three Years before Current Fiscal Year	719,981		719,981		839,508
Four Years before Current Fiscal Year	772,913		772,913		313,808
Prior	876,612		876,612		650,720
Revolving Loans Amortized Cost Basis	1,693,551		1,693,551		1,642,881
Total	6,103,287		6,103,287		6,020,373
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			1,458		4,729
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			1,212		2,909
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			1,342		1,939
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			722		770
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			253		376
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			178		393
Financing Receivable, Revolving, Writeoff			16,702		25,167
Loans charged off	11,018	$ 8,531	21,867	$ 17,287	36,283
Personal Banking Portfolio Segment [Member] | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	206,562		206,562		459,022
Fiscal Year before Current Fiscal Year	418,760		418,760		454,064
Two Years before Current Fiscal Year	434,120		434,120		535,702
Three Years before Current Fiscal Year	513,237		513,237		712,276
Four Years before Current Fiscal Year	675,399		675,399		257,360
Prior	797,810		797,810		598,997
Revolving Loans Amortized Cost Basis	9,294		9,294		8,620
Total	3,055,182		3,055,182		3,026,041
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			30		18
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			96		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			3		23
Financing Receivable, Revolving, Writeoff			0		0
Loans charged off			129		41
Personal Banking Portfolio Segment [Member] | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	247,399		247,399		519,010
Fiscal Year before Current Fiscal Year	445,060		445,060		340,314
Two Years before Current Fiscal Year	284,139		284,139		258,542
Three Years before Current Fiscal Year	206,744		206,744		127,232
Four Years before Current Fiscal Year	97,514		97,514		56,448
Prior	78,802		78,802		51,723
Revolving Loans Amortized Cost Basis	785,951		785,951		724,454
Total	2,145,609		2,145,609		2,077,723
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			14		926
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			1,182		2,891
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			1,246		1,939
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			722		770
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			253		376
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			175		370
Financing Receivable, Revolving, Writeoff			1,240		1,051
Loans charged off			4,832		8,323
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	331,381		331,381		319,894
Total	331,381		331,381		319,894
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Revolving, Writeoff			0		11
Loans charged off			0		11
Personal Banking Portfolio Segment [Member] | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	566,925		566,925		589,913
Total	566,925		566,925		589,913
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Revolving, Writeoff			15,462		24,105
Loans charged off			15,462		24,105
Personal Banking Portfolio Segment [Member] | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	4,190		4,190		6,802
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Total	4,190		4,190		6,802
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			1,444		3,803
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0		0
Financing Receivable, Revolving, Writeoff			0		0
Loans charged off			1,444		3,803
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due
Credit Quality Indicator [Line Items]
Current Fiscal Year	458,058		458,058		981,124
Fiscal Year before Current Fiscal Year	862,046		862,046		792,257
Two Years before Current Fiscal Year	716,025		716,025		791,661
Three Years before Current Fiscal Year	718,054		718,054		838,650
Four Years before Current Fiscal Year	771,275		771,275		313,553
Prior	873,873		873,873		647,741
Revolving Loans Amortized Cost Basis	1,682,206		1,682,206		1,630,592
Total	6,081,537		6,081,537		5,995,578
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	206,562		206,562		455,703
Fiscal Year before Current Fiscal Year	417,333		417,333		452,153
Two Years before Current Fiscal Year	432,219		432,219		533,313
Three Years before Current Fiscal Year	511,454		511,454		711,442
Four Years before Current Fiscal Year	673,853		673,853		257,159
Prior	795,433		795,433		596,439
Revolving Loans Amortized Cost Basis	9,294		9,294		8,620
Total	3,046,148		3,046,148		3,014,829
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	247,306		247,306		518,619
Fiscal Year before Current Fiscal Year	444,713		444,713		340,104
Two Years before Current Fiscal Year	283,806		283,806		258,348
Three Years before Current Fiscal Year	206,600		206,600		127,208
Four Years before Current Fiscal Year	97,422		97,422		56,394
Prior	78,440		78,440		51,302
Revolving Loans Amortized Cost Basis	784,764		784,764		722,595
Total	2,143,051		2,143,051		2,074,570
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	328,645		328,645		317,047
Total	328,645		328,645		317,047
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	559,503		559,503		582,330
Total	559,503		559,503		582,330
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	4,190		4,190		6,802
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Total	4,190		4,190		6,802
Personal Banking Portfolio Segment [Member] | Over 90 days past due
Credit Quality Indicator [Line Items]
Current Fiscal Year	93		93		3,710
Fiscal Year before Current Fiscal Year	1,226		1,226		1,860
Two Years before Current Fiscal Year	2,121		2,121		2,416
Three Years before Current Fiscal Year	1,815		1,815		858
Four Years before Current Fiscal Year	1,638		1,638		98
Prior	1,740		1,740		1,911
Revolving Loans Amortized Cost Basis	9,368		9,368		10,312
Total	18,001		18,001		21,165
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		3,319
Fiscal Year before Current Fiscal Year	879		879		1,650
Two Years before Current Fiscal Year	1,788		1,788		2,222
Three Years before Current Fiscal Year	1,671		1,671		834
Four Years before Current Fiscal Year	1,546		1,546		44
Prior	1,378		1,378		1,490
Revolving Loans Amortized Cost Basis	0		0		0
Total	7,262		7,262		9,559
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	93		93		391
Fiscal Year before Current Fiscal Year	347		347		210
Two Years before Current Fiscal Year	333		333		194
Three Years before Current Fiscal Year	144		144		24
Four Years before Current Fiscal Year	92		92		54
Prior	362		362		421
Revolving Loans Amortized Cost Basis	1,187		1,187		1,859
Total	2,558		2,558		3,153
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	759		759		870
Total	759		759		870
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	7,422		7,422		7,583
Total	7,422		7,422		7,583
Personal Banking Portfolio Segment [Member] | Non-Accrual [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	548		548		261
Two Years before Current Fiscal Year	113		113		167
Three Years before Current Fiscal Year	112		112		0
Four Years before Current Fiscal Year	0		0		157
Prior	999		999		1,068
Revolving Loans Amortized Cost Basis	1,977		1,977		1,977
Total	3,749		3,749		3,630
Personal Banking Portfolio Segment [Member] | Non-Accrual [Member] | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	548		548		261
Two Years before Current Fiscal Year	113		113		167
Three Years before Current Fiscal Year	112		112		0
Four Years before Current Fiscal Year	0		0		157
Prior	999		999		1,068
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,772		1,772		1,653
Personal Banking Portfolio Segment [Member] | Non-Accrual [Member] | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	1,977		1,977		1,977
Total	$ 1,977		$ 1,977		$ 1,977