Loans And Allowance for Credit Losses (Credit Quality Indicators Personal Banking Loan Portfolio) (Details) - Personal Banking Portfolio Segment [Member] - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 875,293	$ 1,268,784
Fiscal Year before Current Fiscal Year	1,012,095	1,238,890
Two Years before Current Fiscal Year	1,025,536	547,174
Three Years before Current Fiscal Year	423,094	237,855
Four Years before Current Fiscal Year	183,454	196,963
Prior	664,169	632,236
Revolving Loans Amortized Cost Basis	1,647,840	1,573,819
Total	5,831,481	5,695,721
Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	422,396	690,306
Fiscal Year before Current Fiscal Year	602,688	889,781
Two Years before Current Fiscal Year	796,140	354,841
Three Years before Current Fiscal Year	299,945	157,718
Four Years before Current Fiscal Year	138,899	149,488
Prior	592,443	553,797
Revolving Loans Amortized Cost Basis	10,008	9,470
Total	2,862,519	2,805,401
Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	449,681	571,738
Fiscal Year before Current Fiscal Year	409,407	349,109
Two Years before Current Fiscal Year	229,396	192,333
Three Years before Current Fiscal Year	123,149	80,137
Four Years before Current Fiscal Year	44,555	47,475
Prior	71,726	78,439
Revolving Loans Amortized Cost Basis	788,457	712,994
Total	2,116,371	2,032,225
Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	286,026	275,945
Total	286,026	275,945
Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	563,349	575,410
Total	563,349	575,410
Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	3,216	6,740
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	3,216	6,740
Current to 90 Days Past Due
Credit Quality Indicator [Line Items]
Current Fiscal Year	875,002	1,268,253
Fiscal Year before Current Fiscal Year	1,011,134	1,237,405
Two Years before Current Fiscal Year	1,023,845	546,368
Three Years before Current Fiscal Year	422,668	237,372
Four Years before Current Fiscal Year	182,911	196,792
Prior	661,730	629,548
Revolving Loans Amortized Cost Basis	1,640,799	1,567,103
Total	5,818,089	5,682,841
Current to 90 Days Past Due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	422,198	690,058
Fiscal Year before Current Fiscal Year	602,071	888,631
Two Years before Current Fiscal Year	795,233	354,292
Three Years before Current Fiscal Year	299,702	157,485
Four Years before Current Fiscal Year	138,681	149,391
Prior	590,278	551,460
Revolving Loans Amortized Cost Basis	10,008	9,470
Total	2,858,171	2,800,787
Current to 90 Days Past Due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	449,631	571,455
Fiscal Year before Current Fiscal Year	409,063	348,774
Two Years before Current Fiscal Year	228,612	192,076
Three Years before Current Fiscal Year	122,966	79,887
Four Years before Current Fiscal Year	44,230	47,401
Prior	71,452	78,088
Revolving Loans Amortized Cost Basis	786,851	712,333
Total	2,112,805	2,030,014
Current to 90 Days Past Due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	285,136	275,144
Total	285,136	275,144
Current to 90 Days Past Due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	558,804	570,156
Total	558,804	570,156
Current to 90 Days Past Due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	3,173	6,740
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	3,173	6,740
Over 90 days past due
Credit Quality Indicator [Line Items]
Current Fiscal Year	291	416
Fiscal Year before Current Fiscal Year	961	1,485
Two Years before Current Fiscal Year	1,691	555
Three Years before Current Fiscal Year	254	374
Four Years before Current Fiscal Year	439	171
Prior	1,325	1,532
Revolving Loans Amortized Cost Basis	7,041	6,716
Total	12,002	11,249
Over 90 days past due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	198	133
Fiscal Year before Current Fiscal Year	617	1,150
Two Years before Current Fiscal Year	907	298
Three Years before Current Fiscal Year	71	124
Four Years before Current Fiscal Year	114	97
Prior	1,051	1,181
Revolving Loans Amortized Cost Basis	0	0
Total	2,958	2,983
Over 90 days past due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	50	283
Fiscal Year before Current Fiscal Year	344	335
Two Years before Current Fiscal Year	784	257
Three Years before Current Fiscal Year	183	250
Four Years before Current Fiscal Year	325	74
Prior	274	351
Revolving Loans Amortized Cost Basis	1,606	661
Total	3,566	2,211
Over 90 days past due | Revolving Home Equity [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	890	801
Total	890	801
Over 90 days past due | Consumer credit card
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	4,545	5,254
Total	4,545	5,254
Over 90 days past due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	43	0
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	43	0
Non-Accrual [Member]
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	115
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	251
Three Years before Current Fiscal Year	172	109
Four Years before Current Fiscal Year	104	0
Prior	1,114	1,156
Revolving Loans Amortized Cost Basis	0	0
Total	1,390	1,631
Non-Accrual [Member] | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	115
Fiscal Year before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	251
Three Years before Current Fiscal Year	172	109
Four Years before Current Fiscal Year	104	0
Prior	1,114	1,156
Revolving Loans Amortized Cost Basis	0	0
Total	$ 1,390	$ 1,631