v3.25.2
Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One $ 2,026,484   $ 2,026,484   $ 3,279,975
Financing Receivable, Originated, Year Two 3,064,293   3,064,293   2,873,863
Financing Receivable, Originated, Year Three 2,721,168   2,721,168   4,270,179
Financing Receivable, Originated, Year Four 4,042,251   4,042,251   2,359,227
Financing Receivable, Originated, Year Five 2,067,356   2,067,356   1,369,849
Financing Receivable, Originated, More Than Five Years 3,907,571   3,907,571   2,993,779
Financing Receivable, Revolving 6,433,729   6,433,729   6,938,929
Financing Receivable, Revolving, Converted to Term Loan 29,359   29,359   28,923
Loans 24,292,211   24,292,211   24,114,724
Financing Receivable, Allowance for Credit Loss, Writeoff 1,313 $ 7,940 3,604 $ 15,000  
Commercial [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 1,174,375   1,174,375   2,067,074
Financing Receivable, Originated, Year Two 1,695,043   1,695,043   1,866,895
Financing Receivable, Originated, Year Three 1,628,743   1,628,743   1,751,617
Financing Receivable, Originated, Year Four 1,590,456   1,590,456   1,095,279
Financing Receivable, Originated, Year Five 911,616   911,616   709,743
Financing Receivable, Originated, More Than Five Years 1,993,567   1,993,567   1,653,117
Financing Receivable, Revolving 5,387,624   5,387,624   5,883,625
Financing Receivable, Revolving, Converted to Term Loan 2,758   2,758   2,786
Loans 14,384,182   14,384,182   15,030,136
Financing Receivable, Allowance for Credit Loss, Writeoff 35 6,391 1,120 10,631  
Commercial [Member] | Healthcare [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 364,559   364,559   539,305
Financing Receivable Year One Originated Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Two 530,397   530,397   597,283
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Three 521,576   521,576   966,286
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, Year Four 908,710   908,710   497,918
Financing Receivable, Originated, Year Four         0
Financing Receivable, Originated, Year Five 398,402   398,402   395,743
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff         0
Financing Receivable, Originated, More Than Five Years 886,868   886,868   719,305
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff         7,240
Financing Receivable, Revolving 198,411   198,411   251,683
Financing Receivable Revolving Writeoff         0
Financing Receivable, Revolving, Converted to Term Loan 13   13   10
Financing Receivable Revolving Converted to Term Writeoff         0
Loans 3,808,936   3,808,936   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 223,199   223,199   629,978
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 539,128   539,128   629,968
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 600,951   600,951   431,168
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 414,038   414,038   406,506
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 346,001   346,001   188,541
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   22
Financing Receivable, Originated, More Than Five Years 718,102   718,102   590,321
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   80
Financing Receivable, Revolving 816,633   816,633   765,942
Financing Receivable Revolving Writeoff     492   9
Financing Receivable, Revolving, Converted to Term Loan 755   755   779
Financing Receivable Revolving Converted to Term Writeoff     21   0
Loans 3,658,807   3,658,807   3,643,203
Financing Receivable, Allowance for Credit Loss, Writeoff     513   111
Commercial [Member] | Energy [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 93,810   93,810   148,972
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 87,071   87,071   46,094
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 39,394   39,394   39,050
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 11,435   11,435   2,621
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 2,437   2,437   6,488
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 22,147   22,147   17,038
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Revolving 2,478,419   2,478,419   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 2,734,713   2,734,713   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 492,807   492,807   748,819
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 538,447   538,447   593,550
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   27
Financing Receivable, Originated, Year Three 466,822   466,822   315,113
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     132   1,465
Financing Receivable, Originated, Year Four 256,273   256,273   188,234
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 164,776   164,776   118,971
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 366,450   366,450   326,453
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     6   166
Financing Receivable, Revolving 1,894,161   1,894,161   1,871,539
Financing Receivable Revolving Writeoff     367   2,425
Financing Receivable, Revolving, Converted to Term Loan 1,990   1,990   1,997
Financing Receivable Revolving Converted to Term Writeoff     8   103
Loans 4,181,726   4,181,726   4,164,676
Financing Receivable, Allowance for Credit Loss, Writeoff     513   4,186
Commercial real estate [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 366,111   366,111   436,206
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 670,901   670,901   512,927
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Three 567,681   567,681   2,056,446
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Four 2,018,504   2,018,504   825,292
Financing Receivable, Originated, Year Four     126   0
Financing Receivable, Originated, Year Five 744,590   744,590   233,619
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 1,034,830   1,034,830   852,655
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     0   1,455
Financing Receivable, Revolving 118,824   118,824   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 5,521,441   5,521,441   5,058,452
Financing Receivable, Allowance for Credit Loss, Writeoff 126 205 126 1,455 1,455
Loans to individuals [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 485,998   485,998   776,695
Financing Receivable, Originated, Year Two 698,349   698,349   494,041
Financing Receivable, Originated, Year Three 524,744   524,744   462,116
Financing Receivable, Originated, Year Four 433,291   433,291   438,656
Financing Receivable, Originated, Year Five 411,150   411,150   426,487
Financing Receivable, Originated, More Than Five Years 879,174   879,174   488,007
Financing Receivable, Revolving 927,281   927,281   913,997
Financing Receivable, Revolving, Converted to Term Loan 26,601   26,601   26,137
Loans 4,386,588   4,386,588   4,026,136
Financing Receivable, Allowance for Credit Loss, Writeoff 1,152 $ 1,344 2,358 $ 2,914  
Loans to individuals [Member] | Residential mortgage [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 309,071   309,071   530,431
Financing Receivable Year One Originated Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, Year Two 456,367   456,367   340,112
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     0   43
Financing Receivable, Originated, Year Three 307,720   307,720   288,166
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     48   0
Financing Receivable, Originated, Year Four 269,681   269,681   319,676
Financing Receivable, Originated, Year Four     0   0
Financing Receivable, Originated, Year Five 302,279   302,279   315,397
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff     0   0
Financing Receivable, Originated, More Than Five Years 510,021   510,021   217,829
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     57   18
Financing Receivable, Revolving 429,282   429,282   401,829
Financing Receivable Revolving Writeoff     130   10
Financing Receivable, Revolving, Converted to Term Loan 26,260   26,260   23,518
Financing Receivable Revolving Converted to Term Writeoff     0   0
Loans 2,610,681   2,610,681   2,436,958
Financing Receivable, Allowance for Credit Loss, Writeoff     235   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 2,399   2,399   4,337
Financing Receivable, Originated, Year Three 5,659   5,659   6,618
Financing Receivable, Originated, Year Four 8,022   8,022   2,432
Financing Receivable, Originated, Year Five 2,741   2,741   3,786
Financing Receivable, Originated, More Than Five Years 129,632   129,632   119,014
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 148,453   148,453   136,649
Loans to individuals [Member] | Personal [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 176,927   176,927   245,802
Financing Receivable Year One Originated Current Fiscal Year Writeoff     2,024 [1]   5,269 [2]
Financing Receivable, Originated, Year Two 239,583   239,583   149,592
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff     58 [1]   69 [2]
Financing Receivable, Originated, Year Three 211,365   211,365   167,332
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff     0 [1]   101 [2]
Financing Receivable, Originated, Year Four 155,588   155,588   116,548
Financing Receivable, Originated, Year Four     11 [1]   52 [2]
Financing Receivable, Originated, Year Five 106,130   106,130   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 239,521   239,521   151,164
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff     5 [1]   0 [2]
Financing Receivable, Revolving 497,999   497,999   512,168
Financing Receivable Revolving Writeoff     25 [1]   26 [2]
Financing Receivable, Revolving, Converted to Term Loan 341   341   2,619
Financing Receivable Revolving Converted to Term Writeoff     0 [1]   20 [2]
Loans 1,627,454   1,627,454   1,452,529
Financing Receivable, Allowance for Credit Loss, Writeoff     2,123 [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 364,559   364,559   539,305
Financing Receivable, Originated, Year Two 530,397   530,397   544,103
Financing Receivable, Originated, Year Three 468,105   468,105   896,042
Financing Receivable, Originated, Year Four 839,066   839,066   481,816
Financing Receivable, Originated, Year Five 392,630   392,630   344,609
Financing Receivable, Originated, More Than Five Years 772,396   772,396   644,441
Financing Receivable, Revolving 197,981   197,981   249,793
Financing Receivable, Revolving, Converted to Term Loan 13   13   10
Loans 3,565,147   3,565,147   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 64,388   64,388   110
Financing Receivable, Originated, Year Five 103   103   0
Financing Receivable, Originated, More Than Five Years 3,315   3,315   32,555
Financing Receivable, Revolving 214   214   255
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 68,020   68,020   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 0   0   38,180
Financing Receivable, Originated, Year Three 37,806   37,806   5,253
Financing Receivable, Originated, Year Four 5,132   5,132   15,529
Financing Receivable, Originated, Year Five 5,215   5,215   51,134
Financing Receivable, Originated, More Than Five Years 98,852   98,852   29,151
Financing Receivable, Revolving 21   21   1,635
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 147,026   147,026   140,882
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 218,684   218,684   629,978
Financing Receivable, Originated, Year Two 538,894   538,894   625,969
Financing Receivable, Originated, Year Three 595,308   595,308   422,015
Financing Receivable, Originated, Year Four 412,456   412,456   404,949
Financing Receivable, Originated, Year Five 343,648   343,648   187,324
Financing Receivable, Originated, More Than Five Years 695,385   695,385   570,775
Financing Receivable, Revolving 794,189   794,189   745,853
Financing Receivable, Revolving, Converted to Term Loan 382   382   379
Loans 3,598,946   3,598,946   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 0   0   0
Financing Receivable, Originated, Year Two 0   0   3,324
Financing Receivable, Originated, Year Three 3,283   3,283   123
Financing Receivable, Originated, Year Four 0   0   1,537
Financing Receivable, Originated, Year Five 937   937   0
Financing Receivable, Originated, More Than Five Years 14,036   14,036   11,796
Financing Receivable, Revolving 3,054   3,054   17,923
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 21,310   21,310   34,703
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 4,020   4,020   0
Financing Receivable, Originated, Year Two 234   234   675
Financing Receivable, Originated, Year Three 2,313   2,313   9,030
Financing Receivable, Originated, Year Four 684   684   20
Financing Receivable, Originated, Year Five 1,218   1,218   1,217
Financing Receivable, Originated, More Than Five Years 8,529   8,529   7,750
Financing Receivable, Revolving 9,851   9,851   1,399
Financing Receivable, Revolving, Converted to Term Loan 373   373   400
Loans 27,222   27,222   20,491
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 93,810   93,810   148,972
Financing Receivable, Originated, Year Two 87,071   87,071   46,094
Financing Receivable, Originated, Year Three 39,394   39,394   39,050
Financing Receivable, Originated, Year Four 11,435   11,435   2,621
Financing Receivable, Originated, Year Five 2,437   2,437   6,488
Financing Receivable, Originated, More Than Five Years 22,107   22,107   16,989
Financing Receivable, Revolving 2,456,182   2,456,182   2,985,161
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 2,712,436   2,712,436   3,245,375
Performing [Member] | Commercial [Member] | Energy [Member] | Special Mention [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 0   0    
Financing Receivable, Originated, Year Two 0   0    
Financing Receivable, Originated, Year Three 0   0    
Financing Receivable, Originated, Year Four 0   0    
Financing Receivable, Originated, Year Five 0   0    
Financing Receivable, Originated, More Than Five Years 0   0    
Financing Receivable, Revolving 22,237   22,237    
Financing Receivable, Revolving, Converted to Term Loan 0   0    
Loans 22,237   22,237    
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One         0
Financing Receivable, Originated, Year Two         0
Financing Receivable, Originated, Year Three         0
Financing Receivable, Originated, Year Four         0
Financing Receivable, Originated, Year Five         0
Financing Receivable, Originated, More Than Five Years         0
Financing Receivable, Revolving         9,300
Financing Receivable, Revolving, Converted to Term Loan         0
Loans         9,300
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 491,792   491,792   740,440
Financing Receivable, Originated, Year Two 533,585   533,585   571,897
Financing Receivable, Originated, Year Three 457,383   457,383   267,528
Financing Receivable, Originated, Year Four 224,337   224,337   176,468
Financing Receivable, Originated, Year Five 162,742   162,742   117,755
Financing Receivable, Originated, More Than Five Years 359,982   359,982   319,986
Financing Receivable, Revolving 1,880,453   1,880,453   1,862,643
Financing Receivable, Revolving, Converted to Term Loan 1,892   1,892   1,938
Loans 4,112,166   4,112,166   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 457   457   4,399
Financing Receivable, Originated, Year Two 2,595   2,595   5,749
Financing Receivable, Originated, Year Three 1,424   1,424   4,285
Financing Receivable, Originated, Year Four 2,020   2,020   7,002
Financing Receivable, Originated, Year Five 0   0   224
Financing Receivable, Originated, More Than Five Years 0   0   1,736
Financing Receivable, Revolving 6,119   6,119   3,037
Financing Receivable, Revolving, Converted to Term Loan 43   43   0
Loans 12,658   12,658   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 558   558   3,980
Financing Receivable, Originated, Year Two 2,267   2,267   15,872
Financing Receivable, Originated, Year Three 8,015   8,015   43,300
Financing Receivable, Originated, Year Four 29,916   29,916   4,764
Financing Receivable, Originated, Year Five 2,033   2,033   992
Financing Receivable, Originated, More Than Five Years 6,458   6,458   4,708
Financing Receivable, Revolving 7,589   7,589   5,859
Financing Receivable, Revolving, Converted to Term Loan 21   21   0
Loans 56,857   56,857   79,475
Performing [Member] | Commercial real estate [Member] | Pass [Member]          
Financing Receivable, Credit Quality Indicator Line Items [Abstract]          
Financing Receivable, Originated, Year One 366,111   366,111   436,206
Financing Receivable, Originated, Year Two 670,413   670,413   512,614
Financing Receivable, Originated, Year Three 567,448   567,448   2,004,558
Financing Receivable, Originated, Year Four 2,011,168   2,011,168   793,161
Financing Receivable, Originated, Year Five 715,266   715,266   233,619
Financing Receivable, Originated, More Than Five Years 986,490   986,490   810,497
Financing Receivable, Revolving 118,824   118,824   141,307
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 5,435,720   5,435,720   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 233   233   14,907
Financing Receivable, Originated, Year Four 0   0   32,131
Financing Receivable, Originated, Year Five 29,324   29,324   0
Financing Receivable, Originated, More Than Five Years 0   0   0
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 29,557   29,557   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 488   488   0
Financing Receivable, Originated, Year Three 0   0   36,981
Financing Receivable, Originated, Year Four 7,336   7,336   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 41,415   41,415   32,253
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 49,239   49,239   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 309,071   309,071   530,186
Financing Receivable, Originated, Year Two 455,755   455,755   338,187
Financing Receivable, Originated, Year Three 305,393   305,393   286,865
Financing Receivable, Originated, Year Four 267,128   267,128   318,935
Financing Receivable, Originated, Year Five 301,090   301,090   314,814
Financing Receivable, Originated, More Than Five Years 500,039   500,039   210,251
Financing Receivable, Revolving 422,935   422,935   395,943
Financing Receivable, Revolving, Converted to Term Loan 25,782   25,782   22,929
Loans 2,587,193   2,587,193   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 318   318   167
Financing Receivable, Originated, Year Three 147   147   148
Financing Receivable, Originated, Year Four 156   156   219
Financing Receivable, Originated, Year Five 29   29   0
Financing Receivable, Originated, More Than Five Years 109   109   113
Financing Receivable, Revolving 1,548   1,548   1,767
Financing Receivable, Revolving, Converted to Term Loan 31   31   0
Loans 2,338   2,338   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 0   0   0
Financing Receivable, Originated, Year Three 0   0   163
Financing Receivable, Originated, Year Four 0   0   0
Financing Receivable, Originated, Year Five 0   0   0
Financing Receivable, Originated, More Than Five Years 1   1   45
Financing Receivable, Revolving 495   495   898
Financing Receivable, Revolving, Converted to Term Loan 0   0   67
Loans 496   496   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 2,399   2,399   4,337
Financing Receivable, Originated, Year Three 5,659   5,659   6,618
Financing Receivable, Originated, Year Four 8,022   8,022   2,432
Financing Receivable, Originated, Year Five 2,741   2,741   3,506
Financing Receivable, Originated, More Than Five Years 122,654   122,654   112,491
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 141,475   141,475   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 176,927   176,927   245,737
Financing Receivable, Originated, Year Two 239,541   239,541   149,572
Financing Receivable, Originated, Year Three 198,752   198,752   167,272
Financing Receivable, Originated, Year Four 155,568   155,568   115,710
Financing Receivable, Originated, Year Five 105,304   105,304   107,291
Financing Receivable, Originated, More Than Five Years 239,385   239,385   151,030
Financing Receivable, Revolving 492,130   492,130   510,147
Financing Receivable, Revolving, Converted to Term Loan 341   341   2,619
Loans 1,607,948   1,607,948   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 0   0   18
Financing Receivable, Originated, Year Two 19   19   17
Financing Receivable, Originated, Year Three 0   0   30
Financing Receivable, Originated, Year Four 9   9   825
Financing Receivable, Originated, Year Five 822   822   8
Financing Receivable, Originated, More Than Five Years 6   6   0
Financing Receivable, Revolving 5,869   5,869   8
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 6,725   6,725   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 0   0   16
Financing Receivable, Originated, Year Two 23   23   0
Financing Receivable, Originated, Year Three 8,017   8,017   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 0   0   1,990
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 8,168   8,168   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 15,665   15,665   96
Financing Receivable, Originated, Year Four 124   124   463
Financing Receivable, Originated, Year Five 454   454   0
Financing Receivable, Originated, More Than Five Years 12,305   12,305   13,158
Financing Receivable, Revolving 195   195   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 28,743   28,743   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 495   495   0
Financing Receivable, Originated, Year Two 0   0   0
Financing Receivable, Originated, Year Three 47   47   0
Financing Receivable, Originated, Year Four 898   898   0
Financing Receivable, Originated, Year Five 198   198   0
Financing Receivable, Originated, More Than Five Years 152   152   0
Financing Receivable, Revolving 9,539   9,539   767
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 11,329   11,329   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 40   40   49
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 40   40   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 1   1   0
Financing Receivable, Originated, More Than Five Years 10   10   23
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 34   34   59
Loans 45   45   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 6,925   6,925   9,905
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 6,925   6,925   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 0   0   245
Financing Receivable, Originated, Year Two 294   294   1,758
Financing Receivable, Originated, Year Three 2,180   2,180   990
Financing Receivable, Originated, Year Four 2,397   2,397   522
Financing Receivable, Originated, Year Five 1,160   1,160   583
Financing Receivable, Originated, More Than Five Years 9,872   9,872   7,420
Financing Receivable, Revolving 4,304   4,304   3,221
Financing Receivable, Revolving, Converted to Term Loan 447   447   522
Loans 20,654   20,654   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 6,978   6,978   6,523
Financing Receivable, Revolving 0   0   0
Financing Receivable, Revolving, Converted to Term Loan 0   0   0
Loans 6,978   6,978   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 0   0   31
Financing Receivable, Originated, Year Two 0   0   3
Financing Receivable, Originated, Year Three 4,596   4,596   30
Financing Receivable, Originated, Year Four 11   11   13
Financing Receivable, Originated, Year Five 4   4   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 $ 4,613   $ 4,613   $ 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.