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Stockholders' Equity (Preferred Stock) - Additional Information (Detail) | May 15, 2020 shares
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Class of Stock [Line Items] |
Preferred stock unissued and undesignated | 20,000,000
Series A Cumulative Redeemable Preferred Stock [Member] |
Class of Stock [Line Items] |
Preferred stock cancelled and undesignated | 1,500,000
Series B Junior Participating Preferred Stock [Member] |
Class of Stock [Line Items] |
Preferred stock cancelled and undesignated | 400,000

X
- Definition Preferred stock cancelled and undesignated. + References No definition available. + Details
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Namespace Prefix: | hci_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred stock unissued and undesignated. + References No definition available. + Details
Name: | hci_PreferredStockUnissuedAndUndesignated
Namespace Prefix: | hci_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=hci_SeriesACumulativeRedeemablePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |