Commitments and Contingencies - Minimum Future Payments Under the Service Agreements (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 23
2020	24
2021	26
Total minimum future payments	$ 73

Amount of required minimum payments for service agreements having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year.

No definition available.

Name:	hci_OperatingLeasesFutureMinimumPaymentsDueInThreeYearsUnderServiceAgreements
Namespace Prefix:	hci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant