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Subsequent Event - Additional Information (Detail) - Hurricane Matthew [Member] - Subsequent Event [Member] | Oct. 27, 2016 USD ($) Claims
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Subsequent Event [Line Items] |
Number of claims received | Claims | 2,000
Pretax initial loss on insurance sold | $ 13,000,000
Minimum [Member] |
Subsequent Event [Line Items] |
Expected gross loss on insurance sold | 20,000,000
Maximum [Member] |
Subsequent Event [Line Items] |
Expected gross loss on insurance sold | $ 25,000,000

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- Definition Represents the number insurance claims received to date. + References No definition available. + Details
Name: | hci_NumberOfInsuranceClaimsReceived
Namespace Prefix: | hci_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Pretax initial loss from catastrophes. + References No definition available. + Details
Name: | hci_PretaxInitialLossFromCatastrophes
Namespace Prefix: | hci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_LossFromCatastrophes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=hci_HurricaneMatthewMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |