Loans And Allowance For Credit Losses (Credit Quality Indicators of the Commercial Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 3,096,706	$ 2,917,439
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,060,412	1,869,035
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,219,682	1,223,303
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	834,144	555,494
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	393,625	408,432
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	566,436	593,927
Revolving Loans Amortized Cost Basis	2,258,796	1,913,008
Total	10,429,801	9,480,638
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,087,509	1,268,784
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	968,994	1,238,890
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	991,093	547,174
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	397,621	237,855
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	170,158	196,963
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	634,299	632,236
Revolving Loans Amortized Cost Basis	1,623,656	1,573,819
Total	5,873,330	5,695,721
Personal Banking Portfolio Segment [Member] | Over 90 days past due [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,060	416
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,218	1,485
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,541	555
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	139	374
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,655	171
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,621	1,532
Revolving Loans Amortized Cost Basis	7,091	6,716
Total	15,325	11,249
Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,465,536	1,476,920
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	796,948	705,474
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	472,643	581,191
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	361,945	267,274
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	182,044	160,729
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	233,171	289,793
Revolving Loans Amortized Cost Basis	2,149,438	1,822,154
Total	5,661,725	5,303,535
Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	538,374	643,868
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	615,959	358,127
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	129,632	66,985
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	27,331	17,991
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	16,071	15,813
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	15,169	2,252
Revolving Loans Amortized Cost Basis	18,559	13,230
Total	1,361,095	1,118,266
Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,092,796	796,651
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	647,505	805,434
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	617,407	575,127
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	444,868	270,229
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	195,510	231,890
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	318,096	301,882
Revolving Loans Amortized Cost Basis	90,799	77,624
Total	3,406,981	3,058,837
Consumer Credit Card [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	584,000	575,410
Total	584,000	575,410
Consumer Credit Card [Member] | Personal Banking Portfolio Segment [Member] | Over 90 days past due [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	5,549	5,254
Total	5,549	5,254
Overdrafts [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,957	6,740
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	14,957	6,740
Overdrafts [Member] | Personal Banking Portfolio Segment [Member] | Over 90 days past due [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	220	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	220	0
Pass [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,079,877	2,848,164
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,995,390	1,762,837
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,149,481	1,173,441
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	812,816	480,987
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	345,308	332,781
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	492,661	527,195
Revolving Loans Amortized Cost Basis	2,255,738	1,884,944
Total	10,131,271	9,010,349
Pass [Member] | Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,456,476	1,473,869
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	782,409	704,157
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	464,201	554,759
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	360,844	248,739
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	180,375	159,238
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	219,053	270,454
Revolving Loans Amortized Cost Basis	2,146,380	1,795,073
Total	5,609,738	5,206,289
Pass [Member] | Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	538,022	598,734
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	596,465	346,507
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	129,632	66,985
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	27,331	2,110
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,305	2,655
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,029	2,252
Revolving Loans Amortized Cost Basis	18,559	13,230
Total	1,313,343	1,032,473
Pass [Member] | Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,085,379	775,561
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	616,516	712,173
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	555,648	551,697
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	424,641	230,138
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	163,628	170,888
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	271,579	254,489
Revolving Loans Amortized Cost Basis	90,799	76,641
Total	3,208,190	2,771,587
Special Mention [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	8,073	50,445
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,548	30,448
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8,375	28,076
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	10,800	50,611
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,043	3,558
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	279	5,335
Revolving Loans Amortized Cost Basis	1,319	16,546
Total	32,437	185,019
Special Mention [Member] | Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,113	1,785
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,548	126
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,757	17,576
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,063	12,050
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	67	1,490
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	3,232
Revolving Loans Amortized Cost Basis	1,319	16,545
Total	15,867	52,804
Special Mention [Member] | Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	352	44,649
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	985
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	352	45,634
Special Mention [Member] | Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,608	4,011
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	30,322
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	618	10,500
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9,737	37,576
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	976	2,068
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	279	2,103
Revolving Loans Amortized Cost Basis	0	1
Total	16,218	86,581
Substandard [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	8,547	18,400
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	60,442	75,750
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	61,826	21,785
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	10,527	22,158
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	46,358	72,093
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	69,714	56,040
Revolving Loans Amortized Cost Basis	1,739	11,518
Total	259,153	277,744
Substandard [Member] | Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	5,752	836
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	10,004	1,191
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	685	8,855
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	37	4,936
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	810	1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,342	10,775
Revolving Loans Amortized Cost Basis	1,739	10,536
Total	29,369	37,130
Substandard [Member] | Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	485
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	19,494	11,620
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	14,896
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,766	13,158
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,140	0
Revolving Loans Amortized Cost Basis	0	0
Total	47,400	40,159
Substandard [Member] | Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,795	17,079
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	30,944	62,939
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	61,141	12,930
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	10,490	2,326
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	30,782	58,934
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	46,232	45,265
Revolving Loans Amortized Cost Basis	0	982
Total	182,384	200,455
Non-Accrual [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	209	430
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,032	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	1
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1	1,738
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	916	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,782	5,357
Revolving Loans Amortized Cost Basis	0	0
Total	6,940	7,526
Non-Accrual [Member] | Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	195	430
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,987	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	1
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1	1,549
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	792	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,776	5,332
Revolving Loans Amortized Cost Basis	0	0
Total	6,751	7,312
Non-Accrual [Member] | Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	45	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	189
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	124	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6	25
Revolving Loans Amortized Cost Basis	0	0
Total	$ 189	$ 214