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Bank segment (HEI only) - Capital And Ratio (Details) - American Savings Bank (ASB) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 leverage, actual capital | $ 606,291 | $ 571,810
Tier 1 leverage, actual ratio | 8.70% | 8.58%
Tier 1 leverage, required capital | $ 278,811 | $ 266,430
Tier 1 leverage, required ratio | 4.00% | 4.00%
Tier 1 leverage, required to be well capitalized capital | $ 348,514 | $ 333,038
Tier 1 leverage, required to be well capitalized ratio | 5.00% | 5.00%
Common equity tier 1, actual capital | $ 606,291 | $ 571,810
Common equity tier 1, actual ratio | 12.80% | 12.95%
Common equity tier 1, required capital | $ 213,190 | $ 198,628
Common equity tier 1, required ratio | 4.50% | 4.50%
Common equity tier 1, required to be well capitalized, Capital | $ 307,941 | $ 286,907
Common equity tier 1, required to be well capitalized, Ratio | 6.50% | 6.50%
Tier 1 capital, actual capital | $ 606,291 | $ 571,810
Tier 1 capital, actual ratio | 12.80% | 12.95%
Tier 1 capital, required capital | $ 284,253 | $ 264,838
Tier 1 capital, required ratio | 6.00% | 6.00%
Tier 1 capital, Required to be well capitalized, Capital | $ 379,004 | $ 353,117
Tier 1 capital, Required to be well capitalized, Ratio | 8.00% | 8.00%
Total capital, Actual capital | $ 660,151 | $ 626,987
Total capital, Actual ratio | 13.93% | 14.20%
Total capital, Required capital | $ 379,004 | $ 353,117
Total capital, Required ratio | 8.00% | 8.00%
Total capital, Required to be well capitalized, Capital | $ 473,755 | $ 441,396
Total capital, Required to be well capitalized, Ratio | 10.00% | 10.00%

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