Loans (Gross Charge-Offs By Year of Origination) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 25,974	$ 6,301
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	359	1,510
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,785	1,161
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,079	4,845
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,310	1,473
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,209	1,700
Financing Receivable, Revolving	5,711	10,604
Financing Receivable, Revolving, Converted to Term Loan	17,480	10,239
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	24,302
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,537
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,322
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	170
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	184
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	460
Financing Receivable, Revolving	14,084
Financing Receivable, Revolving, Converted to Term Loan	6,872
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,619,306	1,703,185
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	768,246	657,039
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	491,938	498,213
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	364,446	241,997
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	182,089	138,541
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	219,766	195,754
Financing Receivable, Revolving	2,247,752	2,170,182
Financing Receivable, Allowance for Credit Loss, Writeoff	18,315	6,575	$ 5,513
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	359	1,252
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,635	1,089
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	985	3,242
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,257	1,197
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,006	191
Financing Receivable, Revolving	9	2,973
Financing Receivable, Revolving, Converted to Term Loan	14,294	8,186
Commercial Portfolio Segment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	124
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,704
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	754
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	157
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	183
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	38
Financing Receivable, Revolving	9,511
Financing Receivable, Revolving, Converted to Term Loan	5,844
Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	277,722	352,224
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	61,500	100,862
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	74,631	5,312
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,835	8,659
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,876	3,078
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,541	2,913
Financing Receivable, Revolving	495,329	408,022
Financing Receivable, Allowance for Credit Loss, Writeoff	518	371	5,331
Commercial and Industrial Total Energy Loans [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	5,875	4,657
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	72
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	56	1,386
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,321	10
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	4,102	7,631
Financing Receivable, Revolving, Converted to Term Loan	146	1,468
Commercial and Industrial Total Energy Loans [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	518
Commercial Real Estate, Buildings, Land and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,645,223	1,901,888
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,785,624	1,528,173
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,253,062	1,009,197
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	811,574	745,031
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	522,566	410,327
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	953,768	882,021
Financing Receivable, Revolving	229,733	120,958
Financing Receivable, Allowance for Credit Loss, Writeoff	216
Commercial Real Estate, Buildings, Land and Other [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	20,099	1,644
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	150	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	217
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,451	266
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	720	1,425
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Commercial Real Estate, Buildings, Land and Other [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	146
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	64
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	0
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	560,720	666,024
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	576,374	491,563
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	344,641	130,888
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	28,063	2,236
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	296	486
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,613	1,726
Financing Receivable, Revolving	169,017	181,180
Financing Receivable, Allowance for Credit Loss, Writeoff	739
Construction Loans [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [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
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Construction Loans [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	739
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	0
Total consumer real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	2,883	912	829
Total consumer real estate loans [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	258
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	38	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,281	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	483	84
Financing Receivable, Revolving	1,600	0
Financing Receivable, Revolving, Converted to Term Loan	3,040	585
Total consumer real estate loans [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	118
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	281
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	348
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	329
Financing Receivable, Revolving	1,807
Financing Receivable, Revolving, Converted to Term Loan	0
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	31,260	24,388	18,614
Consumer Loan [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [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
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Consumer Loan [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	23,321
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,546
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	74
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	13
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	29
Financing Receivable, Revolving	2,766
Financing Receivable, Revolving, Converted to Term Loan	510
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 53,931	$ 32,948	$ 30,686