Loans And Allowance for Credit Losses (Credit Quality Indicators Personal Banking Loan Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Credit Quality Indicator [Line Items]
Loans charged off	$ 8,838	$ 6,740	$ 17,886	$ 14,202
Personal Banking Portfolio Segment [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	581,679		581,679		$ 1,087,509
Fiscal Year before Current Fiscal Year	873,722		873,722		968,994
Two Years before Current Fiscal Year	866,542		866,542		991,093
Three Years before Current Fiscal Year	910,408		910,408		397,621
Four Years before Current Fiscal Year	355,496		355,496		170,158
Prior	718,951		718,951		634,299
Revolving Loans Amortized Cost Basis	1,670,243		1,670,243		1,623,656
Total	5,977,041		5,977,041		5,873,330
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			1,945
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			1,283
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			996
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			492
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			173
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			256
Financing Receivable, Revolving, Writeoff			12,142
Loans charged off	8,531	$ 6,533	17,287	$ 13,818
Personal Banking Portfolio Segment [Member] | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	256,814		256,814		535,797
Fiscal Year before Current Fiscal Year	480,557		480,557		590,625
Two Years before Current Fiscal Year	559,355		559,355		785,041
Three Years before Current Fiscal Year	747,437		747,437		290,830
Four Years before Current Fiscal Year	277,518		277,518		133,795
Prior	648,533		648,533		571,816
Revolving Loans Amortized Cost Basis	10,385		10,385		10,174
Total	2,980,599		2,980,599		2,918,078
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			18
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			18
Financing Receivable, Revolving, Writeoff			0
Loans charged off			36
Personal Banking Portfolio Segment [Member] | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	317,628		317,628		536,755
Fiscal Year before Current Fiscal Year	393,165		393,165		378,369
Two Years before Current Fiscal Year	307,187		307,187		206,052
Three Years before Current Fiscal Year	162,971		162,971		106,791
Four Years before Current Fiscal Year	77,978		77,978		36,363
Prior	70,418		70,418		62,483
Revolving Loans Amortized Cost Basis	781,258		781,258		732,275
Total	2,110,605		2,110,605		2,059,088
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			61
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			1,265
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			996
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			492
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			173
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			238
Financing Receivable, Revolving, Writeoff			505
Loans charged off			3,730
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	303,845		303,845		297,207
Total	303,845		303,845		297,207
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Revolving, Writeoff			0
Loans charged off			0
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	574,755		574,755		584,000
Total	574,755		574,755		584,000
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Revolving, Writeoff			11,637
Loans charged off			11,637
Personal Banking Portfolio Segment [Member] | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	7,237		7,237		14,957
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	7,237		7,237		14,957
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			1,884
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Revolving, Writeoff			0
Loans charged off			1,884
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due
Credit Quality Indicator [Line Items]
Current Fiscal Year	581,563		581,563		1,086,449
Fiscal Year before Current Fiscal Year	872,628		872,628		967,776
Two Years before Current Fiscal Year	865,127		865,127		989,500
Three Years before Current Fiscal Year	908,950		908,950		397,313
Four Years before Current Fiscal Year	355,279		355,279		168,401
Prior	714,560		714,560		630,635
Revolving Loans Amortized Cost Basis	1,662,809		1,662,809		1,616,565
Total	5,960,916		5,960,916		5,856,639
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	256,814		256,814		535,283
Fiscal Year before Current Fiscal Year	479,786		479,786		589,658
Two Years before Current Fiscal Year	558,080		558,080		783,651
Three Years before Current Fiscal Year	746,091		746,091		290,580
Four Years before Current Fiscal Year	277,351		277,351		132,305
Prior	644,588		644,588		568,380
Revolving Loans Amortized Cost Basis	10,385		10,385		10,174
Total	2,973,095		2,973,095		2,910,031
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	317,512		317,512		536,429
Fiscal Year before Current Fiscal Year	392,842		392,842		378,118
Two Years before Current Fiscal Year	307,047		307,047		205,849
Three Years before Current Fiscal Year	162,859		162,859		106,733
Four Years before Current Fiscal Year	77,928		77,928		36,096
Prior	69,972		69,972		62,255
Revolving Loans Amortized Cost Basis	780,581		780,581		731,436
Total	2,108,741		2,108,741		2,056,916
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	303,005		303,005		296,504
Total	303,005		303,005		296,504
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	568,838		568,838		578,451
Total	568,838		568,838		578,451
Personal Banking Portfolio Segment [Member] | Current to 90 Days Past Due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	7,237		7,237		14,737
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	7,237		7,237		14,737
Personal Banking Portfolio Segment [Member] | Over 90 days past due
Credit Quality Indicator [Line Items]
Current Fiscal Year	116		116		1,060
Fiscal Year before Current Fiscal Year	1,045		1,045		1,218
Two Years before Current Fiscal Year	1,415		1,415		1,541
Three Years before Current Fiscal Year	1,458		1,458		139
Four Years before Current Fiscal Year	50		50		1,655
Prior	3,331		3,331		2,621
Revolving Loans Amortized Cost Basis	7,434		7,434		7,091
Total	14,849		14,849		15,325
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		514
Fiscal Year before Current Fiscal Year	722		722		967
Two Years before Current Fiscal Year	1,275		1,275		1,338
Three Years before Current Fiscal Year	1,346		1,346		81
Four Years before Current Fiscal Year	0		0		1,388
Prior	2,885		2,885		2,393
Revolving Loans Amortized Cost Basis	0		0		0
Total	6,228		6,228		6,681
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	116		116		326
Fiscal Year before Current Fiscal Year	323		323		251
Two Years before Current Fiscal Year	140		140		203
Three Years before Current Fiscal Year	112		112		58
Four Years before Current Fiscal Year	50		50		267
Prior	446		446		228
Revolving Loans Amortized Cost Basis	677		677		839
Total	1,864		1,864		2,172
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	840		840		703
Total	840		840		703
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	5,917		5,917		5,549
Total	5,917		5,917		5,549
Personal Banking Portfolio Segment [Member] | Over 90 days past due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year					220
Fiscal Year before Current Fiscal Year					0
Two Years before Current Fiscal Year					0
Three Years before Current Fiscal Year					0
Four Years before Current Fiscal Year					0
Prior					0
Revolving Loans Amortized Cost Basis					0
Total					220
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	49		49		0
Two Years before Current Fiscal Year	0		0		52
Three Years before Current Fiscal Year	0		0		169
Four Years before Current Fiscal Year	167		167		102
Prior	1,060		1,060		1,043
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,276		1,276		1,366
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	49		49		0
Two Years before Current Fiscal Year	0		0		52
Three Years before Current Fiscal Year	0		0		169
Four Years before Current Fiscal Year	167		167		102
Prior	1,060		1,060		1,043
Revolving Loans Amortized Cost Basis	0		0		0
Total	$ 1,276		$ 1,276		$ 1,366