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Bank segment (HEI only) - Loan Modifications (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract | Dec. 31, 2016 USD ($) contract
Loan modifications determined to be troubled debt restructurings |  |  |
Commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring | $ 0 | $ 0 |
Troubled debt restructurings real estate loans |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 81 | 64 | 67
Pre-modification outstanding recorded investment | $ 12,920,000 | $ 4,798,000 | $ 26,937,000
Post-modification outstanding recorded investment | 12,961,000 | 4,792,000 | 27,052,000
Net increase in ALLL | $ 1,413,000 | $ 877,000 | $ 1,756,000
Minimum period of payment default of loans determined to be TDRs | 90 days | 90 days | 90 days
Troubled debt restructurings real estate loans | Residential 1-4 family |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 5 | 7 | 14
Pre-modification outstanding recorded investment | $ 1,107,000 | $ 742,000 | $ 3,131,000
Post-modification outstanding recorded investment | 1,133,000 | 750,000 | 3,245,000
Net increase in ALLL | $ 17,000 | $ 45,000 | $ 337,000
Troubled debt restructurings real estate loans | Commercial real estate |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Pre-modification outstanding recorded investment | $ 0 | $ 0 | $ 0
Post-modification outstanding recorded investment | 0 | 0 | 0
Net increase in ALLL | $ 0 | $ 0 | $ 0
Troubled debt restructurings real estate loans | Home equity line of credit |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 58 | 46 | 36
Pre-modification outstanding recorded investment | $ 7,487,000 | $ 3,016,000 | $ 3,337,000
Post-modification outstanding recorded investment | 7,492,000 | 3,002,000 | 3,337,000
Net increase in ALLL | $ 1,220,000 | $ 557,000 | $ 554,000
Troubled debt restructurings real estate loans | Residential land |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 5 | 1 | 2
Pre-modification outstanding recorded investment | $ 1,776,000 | $ 92,000 | $ 203,000
Post-modification outstanding recorded investment | 1,786,000 | 92,000 | 204,000
Net increase in ALLL | $ 0 | $ 0 | $ 0
Troubled debt restructurings real estate loans | Commercial construction |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Pre-modification outstanding recorded investment | $ 0 | $ 0 | $ 0
Post-modification outstanding recorded investment | 0 | 0 | 0
Net increase in ALLL | $ 0 | $ 0 | $ 0
Troubled debt restructurings real estate loans | Residential construction |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Pre-modification outstanding recorded investment | $ 0 | $ 0 | $ 0
Post-modification outstanding recorded investment | 0 | 0 | 0
Net increase in ALLL | $ 0 | $ 0 | $ 0
Troubled debt restructurings real estate loans | Commercial |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 13 | 9 | 15
Pre-modification outstanding recorded investment | $ 2,550,000 | $ 889,000 | $ 20,266,000
Post-modification outstanding recorded investment | 2,550,000 | 889,000 | 20,266,000
Net increase in ALLL | $ 176,000 | $ 248,000 | $ 865,000
Troubled debt restructurings real estate loans | Consumer |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 1 | 0
Pre-modification outstanding recorded investment | $ 0 | $ 59,000 | $ 0
Post-modification outstanding recorded investment | 0 | 59,000 | 0
Net increase in ALLL | $ 0 | $ 27,000 | $ 0
Troubled debt restructurings that subsequently defaulted |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 2 | 1 | 2
Recorded investment | $ 327,000 | $ 222,000 | $ 263,000
Consumer mortgage loans collateralized by residential real estate property in foreclosure process | $ 4,200,000 | $ 4,300,000 |
Troubled debt restructurings that subsequently defaulted | Residential 1-4 family |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 1 | 1
Recorded investment | $ 0 | $ 222,000 | $ 239,000
Troubled debt restructurings that subsequently defaulted | Commercial real estate |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Recorded investment | $ 0 | $ 0 | $ 0
Troubled debt restructurings that subsequently defaulted | Home equity line of credit |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 1 | 0 | 0
Recorded investment | $ 81,000 | $ 0 | $ 0
Troubled debt restructurings that subsequently defaulted | Residential land |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Recorded investment | $ 0 | $ 0 | $ 0
Troubled debt restructurings that subsequently defaulted | Commercial construction |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Recorded investment | $ 0 | $ 0 | $ 0
Troubled debt restructurings that subsequently defaulted | Residential construction |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Recorded investment | $ 0 | $ 0 | $ 0
Troubled debt restructurings that subsequently defaulted | Commercial |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 1 | 0 | 1
Recorded investment | $ 246,000 | $ 0 | $ 24,000
Troubled debt restructurings that subsequently defaulted | Consumer |  |  |
Loan modifications determined to be troubled debt restructurings |  |  |
Number of contracts | contract | 0 | 0 | 0
Recorded investment | $ 0 | $ 0 | $ 0

X
- Definition Represents the commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring. + References No definition available. + Details
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- Definition Amount of increase (decrease) of allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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