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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure [Table] |  |  |  |
Pay vs Performance [Table Text Block] | In accordance with the SEC’s disclosure requirements regarding pay versus performance, or PVP, this section presents the SEC-defined “Compensation Actually Paid,” or CAP. Also required by the SEC, this section compares CAP to various measures used to gauge performance.
|  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |  |  |  |
Year | Summary Compensation Table Total for PEO ($) (1) |  | Compensation Actually Paid to PEO ($) (1) (2) |  | Average Summary Compensation Table Total for Non-PEO Named Executive Officers ($) (3) |  | Average Compensation Actually Paid to Non-PEO Named Executive Officers ($) (2) (3) |  | Total Shareholder Return ($) |  | Peer Group Total Shareholder Return ($) (4) |  | Net Income ($) |  | Return-on-Common Equity (%) (5) |
2023 |  | 4,627,918 |  |  | 4,381,686 |  |  | 1,540,927 |  |  | 1,701,848 |  |  | 89 |  |  | 94 |  |  | 171,202,000 |  |  | 13.89 | %
2022 |  | 6,056,524 |  |  | 5,674,791 |  |  | 2,661,358 |  |  | 2,487,102 |  |  | 91 |  |  | 107 |  |  | 225,804,000 |  |  | 17.83 | %
2021 |  | 7,339,234 |  |  | 8,082,521 |  |  | 3,143,609 |  |  | 3,227,437 |  |  | 95 |  |  | 131 |  |  | 253,372,000 |  |  | 17.92 | %
2020 |  | 4,248,492 |  |  | 3,003,245 |  |  | 1,463,462 |  |  | 1,166,693 |  |  | 84 |  |  | 93 |  |  | 153,804,000 |  |  | 11.56 | %
(1) Reflects compensation for our Chairman, Chief Executive Officer & President, Peter S. Ho, who served as our Principal Executive Officer (PEO) in 2020, 2021, 2022 and 2023. (2) CAP values for fiscal years 2020, 2021, and 2022 differ from those published in our March 17, 2023 proxy. These differences are a result of changes in our understanding of the assumptions and methodologies required under the SEC rule. (3) Reflects compensation for Dean Y. Shigemura, Sharon M. Crofts, James C. Polk, Mary E. Sellers, and Mark A. Rossi in 2020; Dean Y. Shigemura, Sharon M. Crofts, James C. Polk, and Mary E. Sellers in 2021; and Dean Y. Shigemura, Marco A. Abbruzzese, James C. Polk, and Mary E. Sellers in 2022; and Dean Y. Shigemura, Marco A. Abbruzzese, Matthew K.M. Emerson, and S. Bradley Shairson in 2023, as shown in the Summary Compensation Table for each respective year. (4) Peer Group used for TSR comparisons reflects the S&P Supercomposite Regional Bank Index. (5) Return-on-Common-Equity is generally defined as the net income available to common shareholders as a percent of average common equity. |  |  |
Company Selected Measure Name | Return-on-Common-Equity |  |  |
Named Executive Officers, Footnote [Text Block] | Reflects compensation for our Chairman, Chief Executive Officer & President, Peter S. Ho, who served as our Principal Executive Officer (PEO) in 2020, 2021, 2022 and 2023. Reflects compensation for Dean Y. Shigemura, Sharon M. Crofts, James C. Polk, Mary E. Sellers, and Mark A. Rossi in 2020; Dean Y. Shigemura, Sharon M. Crofts, James C. Polk, and Mary E. Sellers in 2021; and Dean Y. Shigemura, Marco A. Abbruzzese, James C. Polk, and Mary E. Sellers in 2022; and Dean Y. Shigemura, Marco A. Abbruzzese, Matthew K.M. Emerson, and S. Bradley Shairson in 2023, as shown in the Summary Compensation Table for each respective year. |  |  |
Peer Group Issuers, Footnote [Text Block] | Peer Group used for TSR comparisons reflects the S&P Supercomposite Regional Bank Index. |  |  |
PEO Total Compensation Amount | $ 4,627,918 | $ 6,056,524 | $ 7,339,234 | $ 4,248,492
PEO Actually Paid Compensation Amount | $ 4,381,686 | 5,674,791 | 8,082,521 | 3,003,245
Adjustment To PEO Compensation, Footnote [Text Block] | To calculate “compensation actually paid” for our CEO and other NEOs, the following adjustments were made to the Summary Compensation Table total pay.
| PEO |  | Other NEO Average |
Adjustments (1) | 2023 |  | 2022 |  | 2021 |  | 2020 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |
Summary Compensation Table Total |  | 4,627,918 |  |  | 6,056,524 |  |  | 7,339,234 |  |  | 4,248,492 |  |  | 1,540,927 |  |  | 2,661,358 |  |  | 3,143,609 |  |  | 1,463,462 |
Deduction for amount reported in “Stock Awards” column of the Summary Compensation Table |  | (3,000,067 | ) |  | (3,000,075 | ) |  | (4,211,668 | ) |  | (2,500,060 | ) |  | (750,079 | ) |  | (1,350,055 | ) |  | (2,003,242 | ) |  | (540,023 | )
Addition of fair value at fiscal year (FY) end, of equity awards granted during the FY that remained outstanding |  | 2,893,835 |  |  | 2,665,970 |  |  | 3,959,251 |  |  | 2,140,993 |  |  | 916,492 |  |  | 1,190,982 |  |  | 1,824,565 |  |  | 462,463 |
Addition of change in fair value at FY end versus prior FY end for awards granted in prior FY that remained outstanding |  | (389,222 | ) |  | (449,810 | ) |  | 389,023 |  |  | (979,172 | ) |  | (59,815 | ) |  | (139,071 | ) |  | 96,406 |  |  | (217,007 | )
Addition of change in fair value at vesting date versus prior FY end for awards granted in prior FY that vested during the FY |  | (75,927 | ) |  | 102,798 |  |  | 327,875 |  |  | (120,582 | ) |  | (9,017 | ) |  | 18,085 |  |  | 79,758 |  |  | (45,446 | )
Addition in respect of any dividends or other earnings paid during applicable FY prior to vesting date of underlying award |  | 325,514 |  |  | 299,384 |  |  | 278,806 |  |  | 216,429 |  |  | 63,340 |  |  | 105,803 |  |  | 86,341 |  |  | 44,648 |
Deduction for values reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table |  | (365 | ) |  | - |  |  | - |  |  | (2,855 | ) |  | - |  |  | - |  |  | - |  |  | (1,404 | )
Compensation Actually Paid |  | 4,381,686 |  |  | 5,674,791 |  |  | 8,082,521 |  |  | 3,003,245 |  |  | 1,701,848 |  |  | 2,487,102 |  |  | 3,227,437 |  |  | 1,166,693 |
(1) Measurement date equity fair values are calculated with assumptions derived on a basis consistent with those used for grant date fair value purposes. |  |  |
Non-PEO NEO Average Total Compensation Amount | $ 1,540,927 | 2,661,358 | 3,143,609 | 1,463,462
Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,701,848 | 2,487,102 | 3,227,437 | 1,166,693
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | To calculate “compensation actually paid” for our CEO and other NEOs, the following adjustments were made to the Summary Compensation Table total pay.
| PEO |  | Other NEO Average |
Adjustments (1) | 2023 |  | 2022 |  | 2021 |  | 2020 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |
Summary Compensation Table Total |  | 4,627,918 |  |  | 6,056,524 |  |  | 7,339,234 |  |  | 4,248,492 |  |  | 1,540,927 |  |  | 2,661,358 |  |  | 3,143,609 |  |  | 1,463,462 |
Deduction for amount reported in “Stock Awards” column of the Summary Compensation Table |  | (3,000,067 | ) |  | (3,000,075 | ) |  | (4,211,668 | ) |  | (2,500,060 | ) |  | (750,079 | ) |  | (1,350,055 | ) |  | (2,003,242 | ) |  | (540,023 | )
Addition of fair value at fiscal year (FY) end, of equity awards granted during the FY that remained outstanding |  | 2,893,835 |  |  | 2,665,970 |  |  | 3,959,251 |  |  | 2,140,993 |  |  | 916,492 |  |  | 1,190,982 |  |  | 1,824,565 |  |  | 462,463 |
Addition of change in fair value at FY end versus prior FY end for awards granted in prior FY that remained outstanding |  | (389,222 | ) |  | (449,810 | ) |  | 389,023 |  |  | (979,172 | ) |  | (59,815 | ) |  | (139,071 | ) |  | 96,406 |  |  | (217,007 | )
Addition of change in fair value at vesting date versus prior FY end for awards granted in prior FY that vested during the FY |  | (75,927 | ) |  | 102,798 |  |  | 327,875 |  |  | (120,582 | ) |  | (9,017 | ) |  | 18,085 |  |  | 79,758 |  |  | (45,446 | )
Addition in respect of any dividends or other earnings paid during applicable FY prior to vesting date of underlying award |  | 325,514 |  |  | 299,384 |  |  | 278,806 |  |  | 216,429 |  |  | 63,340 |  |  | 105,803 |  |  | 86,341 |  |  | 44,648 |
Deduction for values reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table |  | (365 | ) |  | - |  |  | - |  |  | (2,855 | ) |  | - |  |  | - |  |  | - |  |  | (1,404 | )
Compensation Actually Paid |  | 4,381,686 |  |  | 5,674,791 |  |  | 8,082,521 |  |  | 3,003,245 |  |  | 1,701,848 |  |  | 2,487,102 |  |  | 3,227,437 |  |  | 1,166,693 |
(1) Measurement date equity fair values are calculated with assumptions derived on a basis consistent with those used for grant date fair value purposes. |  |  |
Compensation Actually Paid vs. Total Shareholder Return [Text Block] |  |  |  |
Compensation Actually Paid vs. Net Income [Text Block] |  |  |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] |  |  |  |
Tabular List [Table Text Block] | The following table alphabetically lists the measures we believe are most important in linking compensation actually paid to company performance during 2023. 1. EPS Growth 2. Return on Common Equity 3. Stock Price to Book |  |  |
Total Shareholder Return Amount | $ 89 | 91 | 95 | 84
Peer Group Total Shareholder Return Amount | 94 | 107 | 131 | 93
Net Income (Loss) | $ 171,202,000 | $ 225,804,000 | $ 253,372,000 | $ 153,804,000
Company Selected Measure Amount | 13.89 | 17.83 | 17.92 | 11.56
PEO Name | Peter S. Ho | Peter S. Ho | Peter S. Ho | Peter S. Ho
Measure [Axis]: 1 |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Measure Name | EPS Growth |  |  |
Non-GAAP Measure Description [Text Block] | Return-on-Common-Equity is generally defined as the net income available to common shareholders as a percent of average common equity. |  |  |
Measure [Axis]: 2 |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Measure Name | Return on Common Equity |  |  |
Measure [Axis]: 3 |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Measure Name | Stock Price to Book |  |  |
PEO [Member] | Deduction for Amount Reported in “Stock Awards” Column of the Summary Compensation [Table] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | $ (3,000,067) | $ (3,000,075) | $ (4,211,668) | $ (2,500,060)
PEO [Member] | Addition of Fair Value at Fiscal Year (FY) End, of Equity Awards Granted During the FY that Remained Outstanding |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | 2,893,835 | 2,665,970 | 3,959,251 | 2,140,993
PEO [Member] | Addition of Change in Fair Value at FY End Versus Prior FY End for Awards Granted in Prior FY That Remained Outstanding |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (389,222) | (449,810) | 389,023 | (979,172)
PEO [Member] | Addition of Change in Fair Value at Vesting Date Versus Prior Fiscal Year End for Awards Granted in Prior Fiscal Year That Vested During the Fiscal Year |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (75,927) | (102,798) | (327,875) | (120,582)
PEO [Member] | Addition in Respect of Any Dividends or Other Earnings Paid During Applicable Fiscal Year Prior to Vesting Date of Underlying Award |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | 325,514 | 299,384 | 278,806 | 216,429
PEO [Member] | Deduction for Values Reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the Summary Compensation [Table] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (365) |  |  | (2,855)
Non-PEO NEO [Member] | Deduction for Amount Reported in “Stock Awards” Column of the Summary Compensation [Table] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (750,079) | (1,350,055) | (2,003,242) | (540,023)
Non-PEO NEO [Member] | Addition of Fair Value at Fiscal Year (FY) End, of Equity Awards Granted During the FY that Remained Outstanding |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | 916,492 | 1,190,982 | 1,824,565 | 462,463
Non-PEO NEO [Member] | Addition of Change in Fair Value at FY End Versus Prior FY End for Awards Granted in Prior FY That Remained Outstanding |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (59,815) | (139,071) | 96,406 | (217,007)
Non-PEO NEO [Member] | Addition of Change in Fair Value at Vesting Date Versus Prior Fiscal Year End for Awards Granted in Prior Fiscal Year That Vested During the Fiscal Year |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | (9,017) | (18,085) | (79,758) | (45,446)
Non-PEO NEO [Member] | Addition in Respect of Any Dividends or Other Earnings Paid During Applicable Fiscal Year Prior to Vesting Date of Underlying Award |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount | $ 63,340 | $ 105,803 | $ 86,341 | 44,648
Non-PEO NEO [Member] | Deduction for Values Reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the Summary Compensation [Table] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Adjustment to Compensation Amount |  |  |  | $ (1,404)

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