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Investments - Schedule of Company's Investments in Limited Partnerships (Parenthetical) (Detail) | 6 Months Ended
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Jun. 30, 2015
Private US Lower Middle Market Companies [Member] |
Investment Securities [Line Items] |
Expected term | 10 years
Expiration date of capital commitment | Sep. 03, 2019
Investment additional maturity term | 2 years
Bank Loans Public and Private Corporate Bonds Asset Backed Securities Equity and Debt Restructuring [Member] |
Investment Securities [Line Items] |
Expected term | 3 years
Expiration date of capital commitment | Mar. 31, 2018
Investment additional maturity term | 2 years
Equity and Debt Securities Publicly Traded US and Non US Issuers [Member] |
Investment Securities [Line Items] |
Written notice required for withdrawal to the general partner | 45 days
Minimum Period To Withdrawal By Limited Partners | 12 months
Power Utility and Energy Industries and Infrastructure [Member] |
Investment Securities [Line Items] |
Expected term | 10 years
Expiration date of capital commitment | Jun. 30, 2020
Investment additional maturity term | 3 years

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- Definition The date on which the entity's capital commitment will expire. + References No definition available. + Details
Name: | hci_CommitmentExpirationDate
Namespace Prefix: | hci_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the maximum investment period that can be extended. + References No definition available. + Details
Name: | hci_InvestmentAdditionalMaturityTerm
Namespace Prefix: | hci_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Expected contractual term of limited partnership investment. + References No definition available. + Details
Name: | hci_InvestmentContractualTerm
Namespace Prefix: | hci_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Investment Securities [Line Items] + References No definition available. + Details
Name: | hci_InvestmentSecuritiesLineItems
Namespace Prefix: | hci_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the minimum period before a withdrawal of investment by limited partners is permitted. + References No definition available. + Details
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Namespace Prefix: | hci_
Data Type: | xbrli:durationItemType
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- Definition Written Notice Required For Redemption Period + References No definition available. + Details
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Namespace Prefix: | hci_
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Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=hci_PrivateUSLowerMiddleMarketCompaniesMember
Namespace Prefix: |
Data Type: | na
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Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=hci_BankLoansPublicAndPrivateCorporateBondsAssetBackedSecuritiesEquityAndDebtRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=hci_PowerUtilityAndEnergyIndustriesAndInfrastructureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |