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Subsequent Event - Additional Information (Detail) - Hurricane Matthew [Member] - Subsequent Event [Member]	Oct. 27, 2016 USD ($) Claims
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

X

- Definition

Represents the number insurance claims received to date.

+ References

No definition available.

+ Details

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Namespace Prefix:	hci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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- Details

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- Details

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