Loans And Allowance For Credit Losses (Credit Quality Indicators of the Commercial Loan Portfolio) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loans And Allowance For Loan Losses [Line Items]
Loans charged off	$ 40,168	$ 29,242
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,941,370	3,096,706
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,536,936	2,060,412
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,418,158	1,219,682
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	787,397	834,144
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	550,666	393,625
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	659,957	566,436
Revolving Loans Amortized Cost Basis	2,290,622	2,258,796
Total	11,185,106	10,429,801
Loans charged off	3,885	1,480
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,260
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	57
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	41
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	134
Financing Receivable, Revolving, Writeoff	1,393
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,634,580	1,465,536
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	851,719	796,948
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	583,555	472,643
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	294,635	361,945
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	217,822	182,044
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	272,205	233,171
Revolving Loans Amortized Cost Basis	2,164,520	2,149,438
Total	6,019,036	5,661,725
Loans charged off	3,751
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,260
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	57
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	41
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	1,393
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	479,557	538,374
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	594,946	615,959
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	295,841	129,632
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	41,418	27,331
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	498	16,071
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,834	15,169
Revolving Loans Amortized Cost Basis	31,670	18,559
Total	1,446,764	1,361,095
Loans charged off	0
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
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	827,233	1,092,796
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,090,271	647,505
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	538,762	617,407
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	451,344	444,868
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	332,346	195,510
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	384,918	318,096
Revolving Loans Amortized Cost Basis	94,432	90,799
Total	3,719,306	3,406,981
Loans charged off	134
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	134
Financing Receivable, Revolving, Writeoff	0
Pass [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,893,805	3,079,877
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,482,633	1,995,390
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,362,229	1,149,481
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	747,586	812,816
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	527,943	345,308
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	585,749	492,661
Revolving Loans Amortized Cost Basis	2,222,210	2,255,738
Total	10,822,155	10,131,271
Pass [Member] | Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,609,685	1,456,476
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	839,511	782,409
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	555,991	464,201
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	273,138	360,844
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	215,988	180,375
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	257,177	219,053
Revolving Loans Amortized Cost Basis	2,096,108	2,146,380
Total	5,847,598	5,609,738
Pass [Member] | Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	476,489	538,022
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	579,933	596,465
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	295,841	129,632
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	41,418	27,331
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	498	1,305
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,834	2,029
Revolving Loans Amortized Cost Basis	31,670	18,559
Total	1,428,683	1,313,343
Pass [Member] | Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	807,631	1,085,379
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,063,189	616,516
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	510,397	555,648
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	433,030	424,641
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	311,457	163,628
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	325,738	271,579
Revolving Loans Amortized Cost Basis	94,432	90,799
Total	3,545,874	3,208,190
Special Mention [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	39,357	8,073
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	27,044	2,548
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,940	8,375
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,527	10,800
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,665	1,043
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,218	279
Revolving Loans Amortized Cost Basis	43,054	1,319
Total	143,805	32,437
Special Mention [Member] | Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	19,639	3,113
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,412	2,548
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,489	7,757
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	643	1,063
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	412	67
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,485	0
Revolving Loans Amortized Cost Basis	43,054	1,319
Total	89,134	15,867
Special Mention [Member] | Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,068	352
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	15,013	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	18,081	352
Special Mention [Member] | Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	16,650	4,608
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	8,619	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	451	618
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	884	9,737
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,253	976
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	733	279
Revolving Loans Amortized Cost Basis	0	0
Total	36,590	16,218
Substandard [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	8,208	8,547
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	27,129	60,442
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	34,805	61,826
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	38,284	10,527
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13,058	46,358
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	68,622	69,714
Revolving Loans Amortized Cost Basis	25,358	1,739
Total	215,464	259,153
Substandard [Member] | Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	5,256	5,752
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	8,666	10,004
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,891	685
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	20,854	37
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,422	810
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,235	10,342
Revolving Loans Amortized Cost Basis	25,358	1,739
Total	78,682	29,369
Substandard [Member] | Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [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	19,494
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	14,766
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	13,140
Revolving Loans Amortized Cost Basis	0	0
Total	0	47,400
Substandard [Member] | Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,952	2,795
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	18,463	30,944
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	27,914	61,141
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	17,430	10,490
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11,636	30,782
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	58,387	46,232
Revolving Loans Amortized Cost Basis	0	0
Total	136,782	182,384
Non-Accrual [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	209
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	130	2,032
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,184	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	1
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	916
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,368	3,782
Revolving Loans Amortized Cost Basis	0	0
Total	3,682	6,940
Non-Accrual [Member] | Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	195
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	130	1,987
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,184	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	1
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	792
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,308	3,776
Revolving Loans Amortized Cost Basis	0	0
Total	3,622	6,751
Non-Accrual [Member] | Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	14
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	45
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	124
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	60	6
Revolving Loans Amortized Cost Basis	0	0
Total	$ 60	$ 189