XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.25.3

Allowance for Credit Losses - Credit Quality Information (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, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | $ 14,129,383 |  | $ 14,129,383 |  | $ 14,408,258
Current period gross charge-offs: |  |  |  |  |
Total, Current period gross charge-offs | 6,405 | $ 5,770 | 18,232 | $ 16,392 |
Unlikely to be Collected Financing Receivable |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 0 |  | 0 |  | 0
Real estate loan |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 160,301 |  | 160,301 |  | 210,828
2024/2023 | 188,627 |  | 188,627 |  | 247,668
2023/2022 | 230,535 |  | 230,535 |  | 622,840
2022/2021 | 587,788 |  | 587,788 |  | 1,103,603
2021/2020 | 1,053,513 |  | 1,053,513 |  | 591,758
Prior | 1,845,469 |  | 1,845,469 |  | 1,389,038
Revolving Loans Amortized Cost Basis | 11,713 |  | 11,713 |  | 2,419
Financing Receivable, before Allowance for Credit Loss, Total | 4,077,946 |  | 4,077,946 |  | 4,168,154
Real estate loan | 740 and greater |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 118,602 |  | 118,602 |  | 168,067
2024/2023 | 153,379 |  | 153,379 |  | 187,710
2023/2022 | 183,019 |  | 183,019 |  | 492,845
2022/2021 | 464,813 |  | 464,813 |  | 946,390
2021/2020 | 890,038 |  | 890,038 |  | 498,443
Prior | 1,508,771 |  | 1,508,771 |  | 1,115,557
Financing Receivable, before Allowance for Credit Loss, Total | 3,318,622 |  | 3,318,622 |  | 3,409,012
Real estate loan | 680 - 739 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 14,318 |  | 14,318 |  | 18,368
2024/2023 | 17,797 |  | 17,797 |  | 34,901
2023/2022 | 23,479 |  | 23,479 |  | 65,735
2022/2021 | 59,890 |  | 59,890 |  | 103,622
2021/2020 | 110,055 |  | 110,055 |  | 57,369
Prior | 185,858 |  | 185,858 |  | 138,469
Financing Receivable, before Allowance for Credit Loss, Total | 411,397 |  | 411,397 |  | 418,464
Real estate loan | 620 - 679 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 3,292 |  | 3,292 |  | 1,726
2024/2023 | 4,078 |  | 4,078 |  | 4,380
2023/2022 | 4,988 |  | 4,988 |  | 23,556
2022/2021 | 23,155 |  | 23,155 |  | 19,355
2021/2020 | 17,763 |  | 17,763 |  | 14,058
Prior | 45,190 |  | 45,190 |  | 40,471
Financing Receivable, before Allowance for Credit Loss, Total | 98,466 |  | 98,466 |  | 103,546
Real estate loan | 550 - 619 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2024/2023 | 289 |  | 289 |  | 820
2023/2022 | 443 |  | 443 |  | 6,526
2022/2021 | 3,898 |  | 3,898 |  | 7,745
2021/2020 | 7,554 |  | 7,554 |  | 4,042
Prior | 17,861 |  | 17,861 |  | 13,783
Financing Receivable, before Allowance for Credit Loss, Total | 30,045 |  | 30,045 |  | 32,916
Real estate loan | Less than 550 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2024/2023 | 156 |  | 156 |  | 734
2023/2022 | 1,151 |  | 1,151 |  | 775
2022/2021 | 3,606 |  | 3,606 |  | 2,264
2021/2020 | 4,591 |  | 4,591 |  | 1,559
Prior | 8,836 |  | 8,836 |  | 6,342
Financing Receivable, before Allowance for Credit Loss, Total | 18,340 |  | 18,340 |  | 11,674
Real estate loan | No Score |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 6,473 |  | 6,473 |  | 13,211
2024/2023 | 5,108 |  | 5,108 |  | 6,719
2023/2022 | 5,734 |  | 5,734 |  | 16,839
2022/2021 | 16,590 |  | 16,590 |  | 9,916
2021/2020 | 9,678 |  | 9,678 |  | 5,518
Prior | 45,548 |  | 45,548 |  | 45,604
Financing Receivable, before Allowance for Credit Loss, Total | 89,131 |  | 89,131 |  | 97,807
Real estate loan | Fico Other |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 17,616 |  | 17,616 |  | 9,456
2024/2023 | 7,820 |  | 7,820 |  | 12,404
2023/2022 | 11,721 |  | 11,721 |  | 16,564
2022/2021 | 15,836 |  | 15,836 |  | 14,311
2021/2020 | 13,834 |  | 13,834 |  | 10,769
Prior | 33,405 |  | 33,405 |  | 28,812
Revolving Loans Amortized Cost Basis | 11,713 |  | 11,713 |  | 2,419
Financing Receivable, before Allowance for Credit Loss, Total | 111,945 |  | 111,945 |  | 94,735
Home Equity Line |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 1,166,569 |  | 1,166,569 |  | 1,146,858
Revolving Loans Converted to Term Loans Amortized Cost Basis | 4,253 |  | 4,253 |  | 4,881
Financing Receivable, before Allowance for Credit Loss, Total | 1,170,822 |  | 1,170,822 |  | 1,151,739
Home Equity Line | 740 and greater |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 932,699 |  | 932,699 |  | 925,749
Revolving Loans Converted to Term Loans Amortized Cost Basis | 1,276 |  | 1,276 |  | 1,652
Financing Receivable, before Allowance for Credit Loss, Total | 933,975 |  | 933,975 |  | 927,401
Home Equity Line | 680 - 739 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 173,826 |  | 173,826 |  | 161,523
Revolving Loans Converted to Term Loans Amortized Cost Basis | 1,405 |  | 1,405 |  | 1,030
Financing Receivable, before Allowance for Credit Loss, Total | 175,231 |  | 175,231 |  | 162,553
Home Equity Line | 620 - 679 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 36,242 |  | 36,242 |  | 39,235
Revolving Loans Converted to Term Loans Amortized Cost Basis | 643 |  | 643 |  | 1,220
Financing Receivable, before Allowance for Credit Loss, Total | 36,885 |  | 36,885 |  | 40,455
Home Equity Line | 550 - 619 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 14,408 |  | 14,408 |  | 13,006
Revolving Loans Converted to Term Loans Amortized Cost Basis | 538 |  | 538 |  | 416
Financing Receivable, before Allowance for Credit Loss, Total | 14,946 |  | 14,946 |  | 13,422
Home Equity Line | Less than 550 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 8,653 |  | 8,653 |  | 5,993
Revolving Loans Converted to Term Loans Amortized Cost Basis | 391 |  | 391 |  | 563
Financing Receivable, before Allowance for Credit Loss, Total | 9,044 |  | 9,044 |  | 6,556
Home Equity Line | No Score |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Revolving Loans Amortized Cost Basis | 741 |  | 741 |  | 1,352
Financing Receivable, before Allowance for Credit Loss, Total | 741 |  | 741 |  | 1,352
Total Loans and Leases |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 1,175,609 |  | 1,175,609 |  | 1,183,823
2024/2023 | 1,060,517 |  | 1,060,517 |  | 1,155,877
2023/2022 | 1,090,055 |  | 1,090,055 |  | 2,286,710
2022/2021 | 2,016,241 |  | 2,016,241 |  | 2,322,566
2021/2020 | 2,086,871 |  | 2,086,871 |  | 1,013,551
Prior | 3,929,597 |  | 3,929,597 |  | 3,513,354
Revolving Loans Amortized Cost Basis | 2,742,238 |  | 2,742,238 |  | 2,902,520
Revolving Loans Converted to Term Loans Amortized Cost Basis | 28,255 |  | 28,255 |  | 29,857
Financing Receivable, before Allowance for Credit Loss, Total | 14,129,383 |  | 14,129,383 |  | 14,408,258
Current period gross charge-offs: |  |  |  |  |
2025/2024, Current period gross charge-offs |  |  | 390 |  | 732
2024/2023, Current period gross charge-offs |  |  | 2,644 |  | 2,633
2023/2022, Current period gross charge-offs |  |  | 1,616 |  | 2,941
2022/2021, Current period gross charge-offs |  |  | 1,800 |  | 1,493
2021/2020, Current period gross charge-offs |  |  | 1,030 |  | 897
Prior, Current period gross charge-offs |  |  | 3,858 |  | 5,461
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 6,283 |  | 7,168
Revolving Loans Converted to Term Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 611 |  | 692
Total, Current period gross charge-offs |  |  | 18,232 |  | 22,017
Residential mortgage |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 160,301 |  | 160,301 |  |
2024/2023 | 188,627 |  | 188,627 |  |
2023/2022 | 230,535 |  | 230,535 |  |
2022/2021 | 587,788 |  | 587,788 |  |
2021/2020 | 1,053,513 |  | 1,053,513 |  |
Prior | 1,845,469 |  | 1,845,469 |  |
Revolving Loans Amortized Cost Basis | 1,178,282 |  | 1,178,282 |  |
Revolving Loans Converted to Term Loans Amortized Cost Basis | 4,253 |  | 4,253 |  |
Financing Receivable, before Allowance for Credit Loss, Total | 5,248,768 |  | 5,248,768 |  |
Current period gross charge-offs: |  |  |  |  |
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 30 |  |
Total, Current period gross charge-offs |  |  | 30 |  |
Residential mortgage | Real estate loan |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 4,077,946 |  | 4,077,946 |  | 4,168,154
Residential mortgage | Home Equity Line |  |  |  |  |
Current period gross charge-offs: |  |  |  |  |
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 30 |  |
Total, Current period gross charge-offs |  |  | 30 |  |
Home equity line | Home Equity Line |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 1,170,822 |  | 1,170,822 |  | 1,151,739
Consumer |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 196,207 |  | 196,207 |  | 201,319
2024/2023 | 160,780 |  | 160,780 |  | 140,823
2023/2022 | 103,652 |  | 103,652 |  | 163,652
2022/2021 | 111,816 |  | 111,816 |  | 86,456
2021/2020 | 52,006 |  | 52,006 |  | 30,725
Prior | 20,179 |  | 20,179 |  | 22,228
Revolving Loans Amortized Cost Basis | 365,988 |  | 365,988 |  | 375,829
Revolving Loans Converted to Term Loans Amortized Cost Basis | 3,035 |  | 3,035 |  | 2,937
Financing Receivable, before Allowance for Credit Loss, Total | 1,013,663 |  | 1,013,663 |  | 1,023,969
Current period gross charge-offs: |  |  |  |  |
2025/2024, Current period gross charge-offs |  |  | 389 |  | 732
2024/2023, Current period gross charge-offs |  |  | 1,922 |  | 2,055
2023/2022, Current period gross charge-offs |  |  | 1,392 |  | 2,606
2022/2021, Current period gross charge-offs |  |  | 1,272 |  | 1,388
2021/2020, Current period gross charge-offs |  |  | 674 |  | 676
Prior, Current period gross charge-offs |  |  | 1,804 |  | 2,685
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 6,223 |  | 7,168
Revolving Loans Converted to Term Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 611 |  | 692
Total, Current period gross charge-offs | 4,719 | 4,192 | 14,287 | 13,228 | 18,002
Consumer | 740 and greater |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 84,749 |  | 84,749 |  | 92,329
2024/2023 | 70,671 |  | 70,671 |  | 65,738
2023/2022 | 47,226 |  | 47,226 |  | 84,007
2022/2021 | 57,234 |  | 57,234 |  | 44,192
2021/2020 | 25,525 |  | 25,525 |  | 14,607
Prior | 6,915 |  | 6,915 |  | 6,897
Revolving Loans Amortized Cost Basis | 97,360 |  | 97,360 |  | 101,938
Revolving Loans Converted to Term Loans Amortized Cost Basis | 110 |  | 110 |  | 106
Financing Receivable, before Allowance for Credit Loss, Total | 389,790 |  | 389,790 |  | 409,814
Consumer | 680 - 739 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 65,723 |  | 65,723 |  | 68,371
2024/2023 | 53,325 |  | 53,325 |  | 46,533
2023/2022 | 32,726 |  | 32,726 |  | 44,504
2022/2021 | 28,693 |  | 28,693 |  | 21,829
2021/2020 | 12,675 |  | 12,675 |  | 7,652
Prior | 4,404 |  | 4,404 |  | 5,278
Revolving Loans Amortized Cost Basis | 84,865 |  | 84,865 |  | 86,935
Revolving Loans Converted to Term Loans Amortized Cost Basis | 509 |  | 509 |  | 509
Financing Receivable, before Allowance for Credit Loss, Total | 282,920 |  | 282,920 |  | 281,611
Consumer | 620 - 679 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 33,601 |  | 33,601 |  | 30,618
2024/2023 | 22,847 |  | 22,847 |  | 17,728
2023/2022 | 12,376 |  | 12,376 |  | 19,942
2022/2021 | 13,283 |  | 13,283 |  | 10,252
2021/2020 | 6,706 |  | 6,706 |  | 4,195
Prior | 3,470 |  | 3,470 |  | 4,152
Revolving Loans Amortized Cost Basis | 49,756 |  | 49,756 |  | 50,544
Revolving Loans Converted to Term Loans Amortized Cost Basis | 874 |  | 874 |  | 775
Financing Receivable, before Allowance for Credit Loss, Total | 142,913 |  | 142,913 |  | 138,206
Consumer | 550 - 619 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 6,331 |  | 6,331 |  | 6,108
2024/2023 | 9,720 |  | 9,720 |  | 6,768
2023/2022 | 6,752 |  | 6,752 |  | 9,312
2022/2021 | 8,322 |  | 8,322 |  | 5,702
2021/2020 | 4,309 |  | 4,309 |  | 2,574
Prior | 2,776 |  | 2,776 |  | 3,106
Revolving Loans Amortized Cost Basis | 16,575 |  | 16,575 |  | 15,641
Revolving Loans Converted to Term Loans Amortized Cost Basis | 798 |  | 798 |  | 778
Financing Receivable, before Allowance for Credit Loss, Total | 55,583 |  | 55,583 |  | 49,989
Consumer | Less than 550 |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 1,409 |  | 1,409 |  | 2,012
2024/2023 | 4,204 |  | 4,204 |  | 3,950
2023/2022 | 3,925 |  | 3,925 |  | 5,572
2022/2021 | 4,272 |  | 4,272 |  | 3,594
2021/2020 | 2,226 |  | 2,226 |  | 1,591
Prior | 1,571 |  | 1,571 |  | 1,830
Revolving Loans Amortized Cost Basis | 5,203 |  | 5,203 |  | 5,311
Revolving Loans Converted to Term Loans Amortized Cost Basis | 574 |  | 574 |  | 593
Financing Receivable, before Allowance for Credit Loss, Total | 23,384 |  | 23,384 |  | 24,453
Consumer | No Score |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 842 |  | 842 |  | 1,881
2024/2023 | 13 |  | 13 |  | 106
2023/2022 | 47 |  | 47 |  | 38
2022/2021 | 12 |  | 12 |  |
2021/2020 |  |  |  |  | 7
Prior | 23 |  | 23 |  | 9
Revolving Loans Amortized Cost Basis | 37,625 |  | 37,625 |  | 38,932
Revolving Loans Converted to Term Loans Amortized Cost Basis | 170 |  | 170 |  | 176
Financing Receivable, before Allowance for Credit Loss, Total | 38,732 |  | 38,732 |  | 41,149
Consumer | Fico Other |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 3,552 |  | 3,552 |  |
2023/2022 | 600 |  | 600 |  | 277
2022/2021 |  |  |  |  | 887
2021/2020 | 565 |  | 565 |  | 99
Prior | 1,020 |  | 1,020 |  | 956
Revolving Loans Amortized Cost Basis | 74,604 |  | 74,604 |  | 76,528
Financing Receivable, before Allowance for Credit Loss, Total | 80,341 |  | 80,341 |  | 78,747
Residential Mortgage |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 |  |  |  |  | 210,828
2024/2023 |  |  |  |  | 247,668
2023/2022 |  |  |  |  | 622,840
2022/2021 |  |  |  |  | 1,103,603
2021/2020 |  |  |  |  | 591,758
Prior |  |  |  |  | 1,389,038
Revolving Loans Amortized Cost Basis |  |  |  |  | 1,149,277
Revolving Loans Converted to Term Loans Amortized Cost Basis |  |  |  |  | 4,881
Financing Receivable, before Allowance for Credit Loss, Total |  |  |  |  | 5,319,893
Commercial and Industrial |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 179,486 |  | 179,486 |  | 181,920
2024/2023 | 137,527 |  | 137,527 |  | 84,867
2023/2022 | 66,571 |  | 66,571 |  | 201,675
2022/2021 | 129,860 |  | 129,860 |  | 252,593
2021/2020 | 156,728 |  | 156,728 |  | 19,149
Prior | 259,254 |  | 259,254 |  | 259,834
Revolving Loans Amortized Cost Basis | 1,084,624 |  | 1,084,624 |  | 1,233,054
Revolving Loans Converted to Term Loans Amortized Cost Basis | 13,454 |  | 13,454 |  | 14,336
Financing Receivable, before Allowance for Credit Loss, Total | 2,027,504 |  | 2,027,504 |  | 2,247,428
Current period gross charge-offs: |  |  |  |  |
2025/2024, Current period gross charge-offs |  |  | 1 |  |
2024/2023, Current period gross charge-offs |  |  | 60 |  | 578
2023/2022, Current period gross charge-offs |  |  | 224 |  | 335
2022/2021, Current period gross charge-offs |  |  | 528 |  | 105
2021/2020, Current period gross charge-offs |  |  | 356 |  | 221
Prior, Current period gross charge-offs |  |  | 2,054 |  | 2,376
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 30 |  |
Total, Current period gross charge-offs | 1,106 | 1,178 | 3,253 | 2,764 | 3,615
Commercial and Industrial | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 164,270 |  | 164,270 |  | 163,980
2024/2023 | 126,437 |  | 126,437 |  | 73,554
2023/2022 | 58,184 |  | 58,184 |  | 185,433
2022/2021 | 113,813 |  | 113,813 |  | 249,532
2021/2020 | 154,746 |  | 154,746 |  | 17,775
Prior | 235,902 |  | 235,902 |  | 256,119
Revolving Loans Amortized Cost Basis | 986,942 |  | 986,942 |  | 1,118,075
Revolving Loans Converted to Term Loans Amortized Cost Basis | 13,454 |  | 13,454 |  | 14,336
Financing Receivable, before Allowance for Credit Loss, Total | 1,853,748 |  | 1,853,748 |  | 2,078,804
Commercial and Industrial | Special Mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 369 |  | 369 |  | 808
2024/2023 | 873 |  | 873 |  | 2,385
2023/2022 | 1,975 |  | 1,975 |  | 1,209
2022/2021 | 1,552 |  | 1,552 |  | 68
2021/2020 | 460 |  | 460 |  | 300
Prior | 951 |  | 951 |  | 1,322
Revolving Loans Amortized Cost Basis | 4,901 |  | 4,901 |  | 41,520
Financing Receivable, before Allowance for Credit Loss, Total | 11,081 |  | 11,081 |  | 47,612
Commercial and Industrial | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 522 |  | 522 |  |
2023/2022 | 553 |  | 553 |  | 8,096
2022/2021 | 10,315 |  | 10,315 |  | 196
2021/2020 | 29 |  | 29 |  | 309
Prior | 21,031 |  | 21,031 |  | 1,114
Revolving Loans Amortized Cost Basis | 46,247 |  | 46,247 |  | 26,089
Financing Receivable, before Allowance for Credit Loss, Total | 78,697 |  | 78,697 |  | 35,804
Commercial and Industrial | Other Indicator |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 14,325 |  | 14,325 |  | 17,132
2024/2023 | 10,217 |  | 10,217 |  | 8,928
2023/2022 | 5,859 |  | 5,859 |  | 6,937
2022/2021 | 4,180 |  | 4,180 |  | 2,797
2021/2020 | 1,493 |  | 1,493 |  | 765
Prior | 1,370 |  | 1,370 |  | 1,279
Revolving Loans Amortized Cost Basis | 46,534 |  | 46,534 |  | 47,370
Financing Receivable, before Allowance for Credit Loss, Total | 83,978 |  | 83,978 |  | 85,208
Commercial Real Estate |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 487,374 |  | 487,374 |  | 331,419
2024/2023 | 298,815 |  | 298,815 |  | 372,200
2023/2022 | 376,658 |  | 376,658 |  | 894,467
2022/2021 | 871,814 |  | 871,814 |  | 677,123
2021/2020 | 723,303 |  | 723,303 |  | 311,421
Prior | 1,658,993 |  | 1,658,993 |  | 1,740,968
Revolving Loans Amortized Cost Basis | 89,236 |  | 89,236 |  | 128,691
Revolving Loans Converted to Term Loans Amortized Cost Basis | 7,513 |  | 7,513 |  | 7,703
Financing Receivable, before Allowance for Credit Loss, Total | 4,513,706 |  | 4,513,706 |  | 4,463,992
Current period gross charge-offs: |  |  |  |  |
Prior, Current period gross charge-offs |  |  |  |  | 400
Total, Current period gross charge-offs |  | $ 400 |  | $ 400 | 400
Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 487,374 |  | 487,374 |  | 322,405
2024/2023 | 289,898 |  | 289,898 |  | 369,948
2023/2022 | 374,448 |  | 374,448 |  | 832,005
2022/2021 | 768,901 |  | 768,901 |  | 634,722
2021/2020 | 680,910 |  | 680,910 |  | 308,156
Prior | 1,622,149 |  | 1,622,149 |  | 1,720,243
Revolving Loans Amortized Cost Basis | 77,525 |  | 77,525 |  | 116,682
Revolving Loans Converted to Term Loans Amortized Cost Basis | 7,513 |  | 7,513 |  | 7,703
Financing Receivable, before Allowance for Credit Loss, Total | 4,308,718 |  | 4,308,718 |  | 4,311,864
Commercial Real Estate | Special Mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 |  |  |  |  | 9,014
2024/2023 | 3,336 |  | 3,336 |  | 2,252
2023/2022 | 1,675 |  | 1,675 |  | 7,510
2022/2021 | 45,579 |  | 45,579 |  | 41,399
2021/2020 | 41,394 |  | 41,394 |  | 3,265
Prior | 20,943 |  | 20,943 |  | 10,860
Revolving Loans Amortized Cost Basis | 11,007 |  | 11,007 |  | 11,861
Financing Receivable, before Allowance for Credit Loss, Total | 123,934 |  | 123,934 |  | 86,161
Commercial Real Estate | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2024/2023 | 5,581 |  | 5,581 |  |
2023/2022 | 535 |  | 535 |  | 54,952
2022/2021 | 57,334 |  | 57,334 |  | 1,002
2021/2020 | 999 |  | 999 |  |
Prior | 15,776 |  | 15,776 |  | 9,732
Revolving Loans Amortized Cost Basis | 704 |  | 704 |  | 148
Financing Receivable, before Allowance for Credit Loss, Total | 80,929 |  | 80,929 |  | 65,834
Commercial Real Estate | Other Indicator |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Prior | 125 |  | 125 |  | 133
Financing Receivable, before Allowance for Credit Loss, Total | 125 |  | 125 |  | 133
Construction |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 45,321 |  | 45,321 |  | 104,065
2024/2023 | 186,881 |  | 186,881 |  | 208,070
2023/2022 | 217,624 |  | 217,624 |  | 342,861
2022/2021 | 267,661 |  | 267,661 |  | 188,243
2021/2020 | 89,775 |  | 89,775 |  | 42,795
Prior | 50,092 |  | 50,092 |  | 16,623
Revolving Loans Amortized Cost Basis | 24,108 |  | 24,108 |  | 15,669
Financing Receivable, before Allowance for Credit Loss, Total | 881,462 |  | 881,462 |  | 918,326
Construction | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 40,387 |  | 40,387 |  | 91,583
2024/2023 | 174,819 |  | 174,819 |  | 198,382
2023/2022 | 211,886 |  | 211,886 |  | 332,000
2022/2021 | 234,984 |  | 234,984 |  | 186,682
2021/2020 | 88,827 |  | 88,827 |  | 41,596
Prior | 47,257 |  | 47,257 |  | 13,824
Revolving Loans Amortized Cost Basis | 23,417 |  | 23,417 |  | 14,972
Financing Receivable, before Allowance for Credit Loss, Total | 821,577 |  | 821,577 |  | 879,039
Construction | Special Mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2022/2021 | 27,965 |  | 27,965 |  |
Prior | 130 |  | 130 |  | 155
Financing Receivable, before Allowance for Credit Loss, Total | 28,095 |  | 28,095 |  | 155
Construction | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Prior | 904 |  | 904 |  |
Financing Receivable, before Allowance for Credit Loss, Total | 904 |  | 904 |  |
Construction | Other Indicator |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 4,934 |  | 4,934 |  | 12,482
2024/2023 | 12,062 |  | 12,062 |  | 9,688
2023/2022 | 5,738 |  | 5,738 |  | 10,861
2022/2021 | 4,712 |  | 4,712 |  | 1,561
2021/2020 | 948 |  | 948 |  | 1,199
Prior | 1,801 |  | 1,801 |  | 2,644
Revolving Loans Amortized Cost Basis | 691 |  | 691 |  | 697
Financing Receivable, before Allowance for Credit Loss, Total | 30,886 |  | 30,886 |  | 39,132
Lease financing |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 106,920 |  | 106,920 |  | 154,272
2024/2023 | 87,887 |  | 87,887 |  | 102,249
2023/2022 | 95,015 |  | 95,015 |  | 61,215
2022/2021 | 47,302 |  | 47,302 |  | 14,548
2021/2020 | 11,546 |  | 11,546 |  | 17,703
Prior | 95,610 |  | 95,610 |  | 84,663
Financing Receivable, before Allowance for Credit Loss, Total | 444,280 |  | 444,280 |  | 434,650
Current period gross charge-offs: |  |  |  |  |
2024/2023, Current period gross charge-offs |  |  | 662 |  |
Total, Current period gross charge-offs | 580 |  | 662 |  |
Lease financing | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 106,920 |  | 106,920 |  | 149,615
2024/2023 | 83,244 |  | 83,244 |  | 101,684
2023/2022 | 94,376 |  | 94,376 |  | 60,898
2022/2021 | 47,063 |  | 47,063 |  | 14,328
2021/2020 | 11,403 |  | 11,403 |  | 17,703
Prior | 95,610 |  | 95,610 |  | 84,663
Financing Receivable, before Allowance for Credit Loss, Total | 438,616 |  | 438,616 |  | 428,891
Lease financing | Special Mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2023/2022 | 191 |  | 191 |  |
2022/2021 |  |  |  |  | 220
2021/2020 | 143 |  | 143 |  |
Financing Receivable, before Allowance for Credit Loss, Total | 334 |  | 334 |  | 220
Lease financing | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 |  |  |  |  | 4,657
2024/2023 | 4,643 |  | 4,643 |  | 565
2023/2022 | 448 |  | 448 |  | 317
2022/2021 | 239 |  | 239 |  |
Financing Receivable, before Allowance for Credit Loss, Total | 5,330 |  | 5,330 |  | 5,539
Commercial Lending |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
2025/2024 | 819,101 |  | 819,101 |  | 771,676
2024/2023 | 711,110 |  | 711,110 |  | 767,386
2023/2022 | 755,868 |  | 755,868 |  | 1,500,218
2022/2021 | 1,316,637 |  | 1,316,637 |  | 1,132,507
2021/2020 | 981,352 |  | 981,352 |  | 391,068
Prior | 2,063,949 |  | 2,063,949 |  | 2,102,088
Revolving Loans Amortized Cost Basis | 1,197,968 |  | 1,197,968 |  | 1,377,414
Revolving Loans Converted to Term Loans Amortized Cost Basis | 20,967 |  | 20,967 |  | 22,039
Financing Receivable, before Allowance for Credit Loss, Total | $ 7,866,952 |  | 7,866,952 |  | 8,064,396
Current period gross charge-offs: |  |  |  |  |
2025/2024, Current period gross charge-offs |  |  | 1 |  |
2024/2023, Current period gross charge-offs |  |  | 722 |  | 578
2023/2022, Current period gross charge-offs |  |  | 224 |  | 335
2022/2021, Current period gross charge-offs |  |  | 528 |  | 105
2021/2020, Current period gross charge-offs |  |  | 356 |  | 221
Prior, Current period gross charge-offs |  |  | 2,054 |  | 2,776
Revolving Loans Amortized Cost Basis, Current period gross charge-offs |  |  | 30 |  |
Total, Current period gross charge-offs |  |  | $ 3,915 |  | $ 4,015

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable and net investment in lease. + References No definition available. + Details
Name: | fhb_FinancingReceivableAndNetInvestmentInLeaseExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | fhb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable converted to term loans, amortized cost basis. + References No definition available. + Details
Name: | fhb_FinancingReceivableRevolvingLoansConvertedToTermLoansAmortizedCostBasis
Namespace Prefix: | fhb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffByOriginationYearAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of revolving financing receivable converted to term loan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_UnlikelyToBeCollectedFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoScore740AndGreaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoScore680To739Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoScore620To679Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoScore550To619Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoScoreLessThan550Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_NoFicoScoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditScoreFicoAxis=fhb_FicoOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fhb_CommercialResidentialAndConsumerFinancingReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fhb_HomeEquityLinePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fhb_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=fhb_OtherIndicatorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fhb_ConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |