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Bank segment (HEI only) - Statements of Income Data (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest on deposit liabilities |  |  |  |  |  |  |  |  | $ 13,991 | $ 9,660 | $ 7,167
Total interest expense |  |  |  |  |  |  |  |  | 104,216 | 91,128 | 88,558
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,614,831 |  | 2,380,654
Noninterest expense |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 254,461 | 276,580 | 373,841
Income taxes |  |  |  |  |  |  |  |  | 50,797 | 109,393 | 123,695
Net income (loss) | $ 50,046 | $ 66,371 | $ 46,527 | $ 40,720 | $ 32,843 | $ 60,544 | $ 39,134 | $ 34,666 | 203,664 | 167,187 | 250,146
American Savings Bank (ASB) |  |  |  |  |  |  |  |  |  |  |
Interest and dividend income |  |  |  |  |  |  |  |  |  |  |
Interest and fees on loans |  |  |  |  |  |  |  |  | 220,463 | 207,255 | 199,774
Interest and dividends on investment securities |  |  |  |  |  |  |  |  | 37,762 | 28,823 | 19,184
Total interest and dividend income |  |  |  |  |  |  |  |  | 258,225 | 236,078 | 218,958
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest on deposit liabilities |  |  |  |  |  |  |  |  | 13,991 | 9,660 | 7,167
Interest on other borrowings |  |  |  |  |  |  |  |  | 1,548 | 2,496 | 5,588
Total interest expense |  |  |  |  |  |  |  |  | 15,539 | 12,156 | 12,755
Net interest income |  |  |  |  |  |  |  |  | 242,686 | 223,922 | 206,203
Provision for loan losses |  |  |  |  |  |  |  |  | 14,745 | 10,901 | 16,763
Net interest income after provision for loan losses |  |  |  |  |  |  |  |  | 227,941 | 213,021 | 189,440
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Gains on sale of investment securities, net |  |  |  |  |  |  |  |  | 0 | 0 | 598
Total noninterest income |  |  |  |  |  |  |  |  | 56,050 | 61,562 | 66,966
Noninterest expense |  |  |  |  |  |  |  |  |  |  |
Compensation and employee benefits |  |  |  |  |  |  |  |  | 98,387 | 94,931 | 89,242
Occupancy |  |  |  |  |  |  |  |  | 17,073 | 16,699 | 16,321
Data processing |  |  |  |  |  |  |  |  | 14,268 | 13,280 | 13,030
Services |  |  |  |  |  |  |  |  | 10,847 | 10,994 | 11,054
Equipment |  |  |  |  |  |  |  |  | 7,186 | 7,232 | 6,938
Office supplies, printing and postage |  |  |  |  |  |  |  |  | 6,134 | 6,182 | 6,075
Marketing |  |  |  |  |  |  |  |  | 3,567 | 3,501 | 3,489
FDIC insurance |  |  |  |  |  |  |  |  | 2,713 | 2,904 | 3,543
Other expense |  |  |  |  |  |  |  |  | 17,238 | 20,144 | 19,362
Total noninterest expense |  |  |  |  |  |  |  |  | 177,413 | 175,867 | 169,054
Income before income taxes |  |  |  |  |  |  |  |  | 106,578 | 98,716 | 87,352
Income taxes |  |  |  |  |  |  |  |  | 24,069 | 31,719 | 30,073
Net income (loss) |  |  |  |  |  |  |  |  | 82,509 | 66,997 | 57,279
American Savings Bank (ASB) | Fees from other financial services |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 18,937 | 22,796 | 22,384
American Savings Bank (ASB) | Fee income on deposit liabilities |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 21,311 | 22,204 | 21,759
American Savings Bank (ASB) | Fee income on other financial products |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 7,052 | 7,205 | 8,707
American Savings Bank (ASB) | Bank-owned life insurance |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 5,057 | 5,539 | 4,637
American Savings Bank (ASB) | Mortgage banking income |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,493 | 2,201 | 6,625
American Savings Bank (ASB) | Other income, net |  |  |  |  |  |  |  |  |  |  |
Noninterest income |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 2,200 | $ 1,617 | $ 2,256

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