Loans And Allowance for Credit Losses (Credit Quality Indicators Personal Banking Loan Portfolio) (Details) - Personal Banking Portfolio Segment [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 609,951	$ 1,268,784
Fiscal Year before Current Fiscal Year	1,090,868	1,238,890
Two Years before Current Fiscal Year	1,101,535	547,174
Three Years before Current Fiscal Year	453,472	237,855
Four Years before Current Fiscal Year	198,452	196,963
Prior	706,201	632,236
Revolving Loans Amortized Cost Basis	1,602,718	1,573,819
Total	5,763,197	5,695,721
Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	287,827	690,306
Fiscal Year before Current Fiscal Year	636,155	889,781
Two Years before Current Fiscal Year	826,177	354,841
Three Years before Current Fiscal Year	310,650	157,718
Four Years before Current Fiscal Year	143,800	149,488
Prior	621,402	553,797
Revolving Loans Amortized Cost Basis	10,824	9,470
Total	2,836,835	2,805,401
Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	315,310	571,738
Fiscal Year before Current Fiscal Year	454,713	349,109
Two Years before Current Fiscal Year	275,358	192,333
Three Years before Current Fiscal Year	142,822	80,137
Four Years before Current Fiscal Year	54,652	47,475
Prior	84,799	78,439
Revolving Loans Amortized Cost Basis	761,938	712,994
Total	2,089,592	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	271,854	275,945
Total	271,854	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	558,102	575,410
Total	558,102	575,410
Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	6,814	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	6,814	6,740
Current to 90 Days Past Due
Credit Quality Indicator [Line Items]
Current Fiscal Year	609,920	1,268,253
Fiscal Year before Current Fiscal Year	1,090,116	1,237,405
Two Years before Current Fiscal Year	1,100,119	546,368
Three Years before Current Fiscal Year	452,988	237,372
Four Years before Current Fiscal Year	197,854	196,792
Prior	702,864	629,548
Revolving Loans Amortized Cost Basis	1,596,768	1,567,103
Total	5,750,629	5,682,841
Current to 90 Days Past Due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	287,827	690,058
Fiscal Year before Current Fiscal Year	635,806	888,631
Two Years before Current Fiscal Year	824,919	354,292
Three Years before Current Fiscal Year	310,349	157,485
Four Years before Current Fiscal Year	143,554	149,391
Prior	618,438	551,460
Revolving Loans Amortized Cost Basis	10,824	9,470
Total	2,831,717	2,800,787
Current to 90 Days Past Due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	315,284	571,455
Fiscal Year before Current Fiscal Year	454,310	348,774
Two Years before Current Fiscal Year	275,200	192,076
Three Years before Current Fiscal Year	142,639	79,887
Four Years before Current Fiscal Year	54,300	47,401
Prior	84,426	78,088
Revolving Loans Amortized Cost Basis	760,934	712,333
Total	2,087,093	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	271,036	275,144
Total	271,036	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	553,974	570,156
Total	553,974	570,156
Current to 90 Days Past Due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	6,809	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	6,809	6,740
Over 90 days past due
Credit Quality Indicator [Line Items]
Current Fiscal Year	31	416
Fiscal Year before Current Fiscal Year	752	1,485
Two Years before Current Fiscal Year	1,416	555
Three Years before Current Fiscal Year	310	374
Four Years before Current Fiscal Year	492	171
Prior	2,181	1,532
Revolving Loans Amortized Cost Basis	5,950	6,716
Total	11,132	11,249
Over 90 days past due | Real estate - personal
Credit Quality Indicator [Line Items]
Current Fiscal Year	0	133
Fiscal Year before Current Fiscal Year	349	1,150
Two Years before Current Fiscal Year	1,258	298
Three Years before Current Fiscal Year	127	124
Four Years before Current Fiscal Year	140	97
Prior	1,808	1,181
Revolving Loans Amortized Cost Basis	0	0
Total	3,682	2,983
Over 90 days past due | Consumer
Credit Quality Indicator [Line Items]
Current Fiscal Year	26	283
Fiscal Year before Current Fiscal Year	403	335
Two Years before Current Fiscal Year	158	257
Three Years before Current Fiscal Year	183	250
Four Years before Current Fiscal Year	352	74
Prior	373	351
Revolving Loans Amortized Cost Basis	1,004	661
Total	2,499	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	818	801
Total	818	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	4,128	5,254
Total	4,128	5,254
Over 90 days past due | Overdrafts
Credit Quality Indicator [Line Items]
Current Fiscal Year	5
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	5
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	174	109
Four Years before Current Fiscal Year	106	0
Prior	1,156	1,156
Revolving Loans Amortized Cost Basis	0	0
Total	1,436	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	174	109
Four Years before Current Fiscal Year	106	0
Prior	1,156	1,156
Revolving Loans Amortized Cost Basis	0	0
Total	$ 1,436	$ 1,631