Redeemable Noncontrolling Interest - Summary of Activity of Redeemable Noncontrolling Interest (Parenthetical) (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($)
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests [Abstract]
Net decrease related to warrants	$ 8,640

Net decrease in temporary equity due to the issuance of warrants.

No definition available.

Name:	hci_TemporaryEquityDecreaseInWarrantsNet
Namespace Prefix:	hci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration