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Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One $ 3,459,668   $ 3,459,668   $ 3,279,975
Financing Receivable, Originated, Year Two 3,027,042   3,027,042   2,873,863
Financing Receivable, Originated, Year Three 2,601,810   2,601,810   4,270,179
Financing Receivable, Originated, Year Four 3,745,167   3,745,167   2,359,227
Financing Receivable, Originated, Year Five 2,062,017   2,062,017   1,369,849
Financing Receivable, Originated, More Than Five Years 3,575,601   3,575,601   2,993,779
Financing Receivable, Revolving 6,364,346   6,364,346   6,938,929
Financing Receivable, Revolving, Converted to Term Loan 29,543   29,543   28,923
Loans 24,865,194   24,865,194   24,114,724
Financing Receivable, Allowance for Credit Loss, Writeoff 4,348 $ 2,496 7,952 $ 17,496  
Commercial [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 1,900,068   1,900,068   2,067,074
Financing Receivable, Originated, Year Two 1,543,671   1,543,671   1,866,895
Financing Receivable, Originated, Year Three 1,573,854   1,573,854   1,751,617
Financing Receivable, Originated, Year Four 1,423,018   1,423,018   1,095,279
Financing Receivable, Originated, Year Five 912,677   912,677   709,743
Financing Receivable, Originated, More Than Five Years 1,841,048   1,841,048   1,653,117
Financing Receivable, Revolving 5,316,702   5,316,702   5,883,625
Financing Receivable, Revolving, Converted to Term Loan 1,902   1,902   2,786
Loans 14,512,940   14,512,940   15,030,136
Financing Receivable, Allowance for Credit Loss, Writeoff 3,157 856 4,277 11,487  
Commercial [Member] | Healthcare [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 633,845   633,845   539,305
Financing Receivable Year One Originated Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Two 501,857   501,857   597,283
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Three 523,869   523,869   966,286
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Four 773,255   773,255   497,918
Financing Receivable, Originated, Year Four         0
Financing Receivable, Originated, Year Five 457,872   457,872   395,743
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, More Than Five Years 798,955   798,955   719,305
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff         7,240
Financing Receivable, Revolving 188,879   188,879   251,683
Financing Receivable Revolving Writeoff         0
Financing Receivable, Revolving, Converted to Term Loan 11   11   10
Financing Receivable Revolving Converted to Term Writeoff         0
Loans 3,878,543   3,878,543   3,967,533
Financing Receivable, Allowance for Credit Loss, Writeoff         7,240
Commercial [Member] | Services [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 426,945   426,945   629,978
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 498,969   498,969   629,968
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 574,346   574,346   431,168
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 394,828   394,828   406,506
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 294,043   294,043   188,541
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   22
Financing Receivable, Originated, More Than Five Years 674,672   674,672   590,321
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   80
Financing Receivable, Revolving 846,677   846,677   765,942
Financing Receivable Revolving Writeoff     3,242   9
Financing Receivable, Revolving, Converted to Term Loan 163   163   779
Financing Receivable Revolving Converted to Term Writeoff     21   0
Loans 3,710,643   3,710,643   3,643,203
Financing Receivable, Allowance for Credit Loss, Writeoff     3,263   111
Commercial [Member] | Energy [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 125,265   125,265   148,972
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 70,851   70,851   46,094
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 46,400   46,400   39,050
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 10,977   10,977   2,621
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 2,383   2,383   6,488
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 21,266   21,266   17,038
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Revolving 2,404,370   2,404,370   2,994,461
Financing Receivable Revolving Writeoff     94   226
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Financing Receivable Revolving Converted to Term Writeoff     0   0
Loans 2,681,512   2,681,512   3,254,724
Financing Receivable, Allowance for Credit Loss, Writeoff     94   226
Commercial [Member] | General business [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 714,013   714,013   748,819
Financing Receivable Year One Originated Current Fiscal Year Writeoff     8   0
Financing Receivable, Originated, Year Two 471,994   471,994   593,550
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   27
Financing Receivable, Originated, Year Three 429,239   429,239   315,113
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     132   1,465
Financing Receivable, Originated, Year Four 243,958   243,958   188,234
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 158,379   158,379   118,971
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 346,155   346,155   326,453
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   166
Financing Receivable, Revolving 1,876,776   1,876,776   1,871,539
Financing Receivable Revolving Writeoff     751   2,425
Financing Receivable, Revolving, Converted to Term Loan 1,728   1,728   1,997
Financing Receivable Revolving Converted to Term Writeoff     29   103
Loans 4,242,242   4,242,242   4,164,676
Financing Receivable, Allowance for Credit Loss, Writeoff     920   4,186
Commercial real estate [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 738,423   738,423   436,206
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 815,757   815,757   512,927
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 531,581   531,581   2,056,446
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 1,903,968   1,903,968   825,292
Financing Receivable, Originated, Year Four     126   0
Financing Receivable, Originated, Year Five 754,989   754,989   233,619
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 903,514   903,514   852,655
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   1,455
Financing Receivable, Revolving 104,375   104,375   141,307
Financing Receivable Revolving Writeoff     0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Financing Receivable Revolving Converted to Term Writeoff     0   0
Loans 5,752,607   5,752,607   5,058,452
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0 126 1,455 1,455
Loans to individuals [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 821,177   821,177   776,695
Financing Receivable, Originated, Year Two 667,614   667,614   494,041
Financing Receivable, Originated, Year Three 496,375   496,375   462,116
Financing Receivable, Originated, Year Four 418,181   418,181   438,656
Financing Receivable, Originated, Year Five 394,351   394,351   426,487
Financing Receivable, Originated, More Than Five Years 831,039   831,039   488,007
Financing Receivable, Revolving 943,269   943,269   913,997
Financing Receivable, Revolving, Converted to Term Loan 27,641   27,641   26,137
Loans 4,599,647   4,599,647   4,026,136
Financing Receivable, Allowance for Credit Loss, Writeoff 1,191 $ 1,640 3,549 $ 4,554  
Loans to individuals [Member] | Residential mortgage [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 446,494   446,494   530,431
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 432,258   432,258   340,112
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   43
Financing Receivable, Originated, Year Three 285,602   285,602   288,166
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     48   0
Financing Receivable, Originated, Year Four 261,585   261,585   319,676
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 289,058   289,058   315,397
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 487,533   487,533   217,829
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     56   18
Financing Receivable, Revolving 446,539   446,539   401,829
Financing Receivable Revolving Writeoff     178   10
Financing Receivable, Revolving, Converted to Term Loan 27,297   27,297   23,518
Financing Receivable Revolving Converted to Term Writeoff     0   0
Loans 2,676,366   2,676,366   2,436,958
Financing Receivable, Allowance for Credit Loss, Writeoff     282   71
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   462
Financing Receivable, Originated, Year Two 2,504   2,504   4,337
Financing Receivable, Originated, Year Three 7,145   7,145   6,618
Financing Receivable, Originated, Year Four 8,339   8,339   2,432
Financing Receivable, Originated, Year Five 3,512   3,512   3,786
Financing Receivable, Originated, More Than Five Years 130,142   130,142   119,014
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 151,642   151,642   136,649
Loans to individuals [Member] | Personal [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 374,683   374,683   245,802
Financing Receivable Year One Originated Current Fiscal Year Writeoff     3,130 [1]   5,269 [2]
Financing Receivable, Originated, Year Two 232,852   232,852   149,592
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     66 [1]   69 [2]
Financing Receivable, Originated, Year Three 203,628   203,628   167,332
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     22 [1]   101 [2]
Financing Receivable, Originated, Year Four 148,257   148,257   116,548
Financing Receivable, Originated, Year Four     19 [1]   52 [2]
Financing Receivable, Originated, Year Five 101,781   101,781   107,304
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0 [1]   9 [2]
Financing Receivable, Originated, More Than Five Years 213,364   213,364   151,164
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     5 [1]   0 [2]
Financing Receivable, Revolving 496,730   496,730   512,168
Financing Receivable Revolving Writeoff     25 [1]   26 [2]
Financing Receivable, Revolving, Converted to Term Loan 344   344   2,619
Financing Receivable Revolving Converted to Term Writeoff     0 [1]   20 [2]
Loans 1,771,639   1,771,639   1,452,529
Financing Receivable, Allowance for Credit Loss, Writeoff     3,267 [1]   5,546 [2]
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 633,845   633,845   539,305
Financing Receivable, Originated, Year Two 492,224   492,224   544,103
Financing Receivable, Originated, Year Three 471,134   471,134   896,042
Financing Receivable, Originated, Year Four 725,177   725,177   481,816
Financing Receivable, Originated, Year Five 452,204   452,204   344,609
Financing Receivable, Originated, More Than Five Years 701,112   701,112   644,441
Financing Receivable, Revolving 182,468   182,468   249,793
Financing Receivable, Revolving, Converted to Term Loan 11   11   10
Loans 3,658,175   3,658,175   3,700,119
Performing [Member] | Commercial [Member] | Healthcare [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   15,000
Financing Receivable, Originated, Year Three 0   0   64,895
Financing Receivable, Originated, Year Four 43,817   43,817   110
Financing Receivable, Originated, Year Five 99   99   0
Financing Receivable, Originated, More Than Five Years 0   0   32,555
Financing Receivable, Revolving 215   215   255
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 44,131   44,131   112,815
Performing [Member] | Commercial [Member] | Healthcare [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 9,633   9,633   38,180
Financing Receivable, Originated, Year Three 37,655   37,655   5,253
Financing Receivable, Originated, Year Four 4,178   4,178   15,529
Financing Receivable, Originated, Year Five 5,192   5,192   51,134
Financing Receivable, Originated, More Than Five Years 89,055   89,055   29,151
Financing Receivable, Revolving 6,017   6,017   1,635
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 151,730   151,730   140,882
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 421,853   421,853   629,978
Financing Receivable, Originated, Year Two 497,289   497,289   625,969
Financing Receivable, Originated, Year Three 563,115   563,115   422,015
Financing Receivable, Originated, Year Four 390,330   390,330   404,949
Financing Receivable, Originated, Year Five 291,597   291,597   187,324
Financing Receivable, Originated, More Than Five Years 650,606   650,606   570,775
Financing Receivable, Revolving 838,852   838,852   745,853
Financing Receivable, Revolving, Converted to Term Loan 163   163   379
Loans 3,653,805   3,653,805   3,587,242
Performing [Member] | Commercial [Member] | Services [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 57   57   0
Financing Receivable, Originated, Year Two 1,425   1,425   3,324
Financing Receivable, Originated, Year Three 389   389   123
Financing Receivable, Originated, Year Four 2,179   2,179   1,537
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 15,991   15,991   11,796
Financing Receivable, Revolving 1,356   1,356   17,923
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 21,397   21,397   34,703
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 4,621   4,621   0
Financing Receivable, Originated, Year Two 226   226   675
Financing Receivable, Originated, Year Three 10,800   10,800   9,030
Financing Receivable, Originated, Year Four 1,440   1,440   20
Financing Receivable, Originated, Year Five 2,263   2,263   1,217
Financing Receivable, Originated, More Than Five Years 7,929   7,929   7,750
Financing Receivable, Revolving 515   515   1,399
Financing Receivable, Revolving, Converted to Term Loan 0   0   400
Loans 27,794   27,794   20,491
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 125,265   125,265   148,972
Financing Receivable, Originated, Year Two 70,851   70,851   46,094
Financing Receivable, Originated, Year Three 46,400   46,400   39,050
Financing Receivable, Originated, Year Four 10,977   10,977   2,621
Financing Receivable, Originated, Year Five 2,383   2,383   6,488
Financing Receivable, Originated, More Than Five Years 21,235   21,235   16,989
Financing Receivable, Revolving 2,382,659   2,382,659   2,985,161
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 2,659,770   2,659,770   3,245,375
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 0   0   0
Financing Receivable, Revolving 21,711   21,711   9,300
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 21,711   21,711   9,300
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 709,654   709,654   740,440
Financing Receivable, Originated, Year Two 464,843   464,843   571,897
Financing Receivable, Originated, Year Three 420,590   420,590   267,528
Financing Receivable, Originated, Year Four 207,485   207,485   176,468
Financing Receivable, Originated, Year Five 156,634   156,634   117,755
Financing Receivable, Originated, More Than Five Years 334,999   334,999   319,986
Financing Receivable, Revolving 1,826,400   1,826,400   1,862,643
Financing Receivable, Revolving, Converted to Term Loan 1,643   1,643   1,938
Loans 4,122,248   4,122,248   4,058,655
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 3,488   3,488   4,399
Financing Receivable, Originated, Year Two 1,745   1,745   5,749
Financing Receivable, Originated, Year Three 1,152   1,152   4,285
Financing Receivable, Originated, Year Four 2,368   2,368   7,002
Financing Receivable, Originated, Year Five 0   0   224
Financing Receivable, Originated, More Than Five Years 551   551   1,736
Financing Receivable, Revolving 43,252   43,252   3,037
Financing Receivable, Revolving, Converted to Term Loan 48   48   0
Loans 52,604   52,604   26,432
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 871   871   3,980
Financing Receivable, Originated, Year Two 5,406   5,406   15,872
Financing Receivable, Originated, Year Three 7,497   7,497   43,300
Financing Receivable, Originated, Year Four 34,105   34,105   4,764
Financing Receivable, Originated, Year Five 1,745   1,745   992
Financing Receivable, Originated, More Than Five Years 10,557   10,557   4,708
Financing Receivable, Revolving 7,124   7,124   5,859
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 67,305   67,305   79,475
Performing [Member] | Commercial real estate [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 738,423   738,423   436,206
Financing Receivable, Originated, Year Two 815,271   815,271   512,614
Financing Receivable, Originated, Year Three 531,581   531,581   2,004,558
Financing Receivable, Originated, Year Four 1,898,991   1,898,991   793,161
Financing Receivable, Originated, Year Five 725,665   725,665   233,619
Financing Receivable, Originated, More Than Five Years 859,915   859,915   810,497
Financing Receivable, Revolving 104,375   104,375   141,307
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 5,674,221   5,674,221   4,931,962
Performing [Member] | Commercial real estate [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   313
Financing Receivable, Originated, Year Three 0   0   14,907
Financing Receivable, Originated, Year Four 0   0   32,131
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 3,129   3,129   0
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 3,129   3,129   47,351
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 486   486   0
Financing Receivable, Originated, Year Three 0   0   36,981
Financing Receivable, Originated, Year Four 4,977   4,977   0
Financing Receivable, Originated, Year Five 29,324   29,324   0
Financing Receivable, Originated, More Than Five Years 33,661   33,661   32,253
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 68,448   68,448   69,234
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 446,478   446,478   530,186
Financing Receivable, Originated, Year Two 431,184   431,184   338,187
Financing Receivable, Originated, Year Three 283,185   283,185   286,865
Financing Receivable, Originated, Year Four 259,320   259,320   318,935
Financing Receivable, Originated, Year Five 287,695   287,695   314,814
Financing Receivable, Originated, More Than Five Years 472,200   472,200   210,251
Financing Receivable, Revolving 440,835   440,835   395,943
Financing Receivable, Revolving, Converted to Term Loan 25,256   25,256   22,929
Loans 2,646,153   2,646,153   2,418,110
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 211   211   167
Financing Receivable, Originated, Year Three 55   55   148
Financing Receivable, Originated, Year Four 212   212   219
Financing Receivable, Originated, Year Five 87   87   0
Financing Receivable, Originated, More Than Five Years 5,579   5,579   113
Financing Receivable, Revolving 1,059   1,059   1,767
Financing Receivable, Revolving, Converted to Term Loan 1,233   1,233   0
Loans 8,436   8,436   2,414
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 169   169   0
Financing Receivable, Originated, Year Three 84   84   163
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 86   86   45
Financing Receivable, Revolving 183   183   898
Financing Receivable, Revolving, Converted to Term Loan 0   0   67
Loans 522   522   1,173
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   462
Financing Receivable, Originated, Year Two 2,504   2,504   4,337
Financing Receivable, Originated, Year Three 7,145   7,145   6,618
Financing Receivable, Originated, Year Four 8,339   8,339   2,432
Financing Receivable, Originated, Year Five 3,512   3,512   3,506
Financing Receivable, Originated, More Than Five Years 122,794   122,794   112,491
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 144,294   144,294   129,846
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 367,936   367,936   245,737
Financing Receivable, Originated, Year Two 232,742   232,742   149,572
Financing Receivable, Originated, Year Three 198,942   198,942   167,272
Financing Receivable, Originated, Year Four 148,235   148,235   115,710
Financing Receivable, Originated, Year Five 101,747   101,747   107,291
Financing Receivable, Originated, More Than Five Years 213,229   213,229   151,030
Financing Receivable, Revolving 482,518   482,518   510,147
Financing Receivable, Revolving, Converted to Term Loan 344   344   2,619
Loans 1,745,693   1,745,693   1,449,378
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 37   37   18
Financing Receivable, Originated, Year Two 48   48   17
Financing Receivable, Originated, Year Three 50   50   30
Financing Receivable, Originated, Year Four 10   10   825
Financing Receivable, Originated, Year Five 20   20   8
Financing Receivable, Originated, More Than Five Years 5   5   0
Financing Receivable, Revolving 1,212   1,212   8
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 1,382   1,382   906
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 6,703   6,703   16
Financing Receivable, Originated, Year Two 21   21   0
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   1
Financing Receivable, Originated, More Than Five Years 128   128   129
Financing Receivable, Revolving 13,000   13,000   1,990
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 19,852   19,852   2,136
Nonperforming Financial Instruments [Member] | Commercial [Member] | Healthcare [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 15,080   15,080   96
Financing Receivable, Originated, Year Four 83   83   463
Financing Receivable, Originated, Year Five 377   377   0
Financing Receivable, Originated, More Than Five Years 8,788   8,788   13,158
Financing Receivable, Revolving 179   179   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 24,507   24,507   13,717
Nonperforming Financial Instruments [Member] | Commercial [Member] | Services [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 414   414   0
Financing Receivable, Originated, Year Two 29   29   0
Financing Receivable, Originated, Year Three 42   42   0
Financing Receivable, Originated, Year Four 879   879   0
Financing Receivable, Originated, Year Five 183   183   0
Financing Receivable, Originated, More Than Five Years 146   146   0
Financing Receivable, Revolving 5,954   5,954   767
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 7,647   7,647   767
Nonperforming Financial Instruments [Member] | Commercial [Member] | Energy [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 31   31   49
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 31   31   49
Nonperforming Financial Instruments [Member] | Commercial [Member] | General business [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   32
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 48   48   23
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 37   37   59
Loans 85   85   114
Nonperforming Financial Instruments [Member] | Commercial real estate [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 6,809   6,809   9,905
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 6,809   6,809   9,905
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 16   16   245
Financing Receivable, Originated, Year Two 694   694   1,758
Financing Receivable, Originated, Year Three 2,278   2,278   990
Financing Receivable, Originated, Year Four 2,053   2,053   522
Financing Receivable, Originated, Year Five 1,276   1,276   583
Financing Receivable, Originated, More Than Five Years 9,668   9,668   7,420
Financing Receivable, Revolving 4,462   4,462   3,221
Financing Receivable, Revolving, Converted to Term Loan 808   808   522
Loans 21,255   21,255   15,261
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 0   0   0
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   280
Financing Receivable, Originated, More Than Five Years 7,348   7,348   6,523
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 7,348   7,348   6,803
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Personal [Member] | Nonaccrual [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 7   7   31
Financing Receivable, Originated, Year Two 41   41   3
Financing Receivable, Originated, Year Three 4,636   4,636   30
Financing Receivable, Originated, Year Four 12   12   13
Financing Receivable, Originated, Year Five 14   14   4
Financing Receivable, Originated, More Than Five Years 2   2   5
Financing Receivable, Revolving 0   0   23
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans $ 4,712   $ 4,712   $ 109
[1] Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
[2] Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.