Nature of Operations	6 Months Ended
Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations	Note 1 -- Nature of Operations HCI Group, Inc., together with its subsidiaries (“HCI” or the “Company”), is primarily engaged in the property and casualty insurance business through two Florida domiciled insurance companies, Homeowners Choice Property & Casualty Insurance Company, Inc. (“HCPCI”) and TypTap Insurance Company (“TypTap”). HCPCI is authorized to underwrite various homeowners’ property and casualty insurance products and allied lines business in the state of Florida. HCPCI also offers flood-endorsed and wind-only policies to Florida customers and has regulatory approval to underwrite residential property and casualty insurance in the states of Arkansas, California, Maryland, North Carolina, New Jersey, Ohio, Pennsylvania, South Carolina and Texas. However, Florida is still HCPCI’s primary market. TypTap offers standalone flood and homeowners multi-peril policies. The operations of both insurance subsidiaries are supported by HCI Group, Inc. and certain HCI subsidiaries. In particular, the Company is developing technologies to collect and analyze claims and other supplemental data to generate savings and efficiency for the operations of the insurance subsidiaries. In addition, Greenleaf Capital, LLC, the Company’s real estate subsidiary, is primarily engaged in the businesses of owning and leasing real estate and operating marina facilities and one restaurant. On February 5, 2020, HCPCI entered into a policy replacement agreement with Anchor Property & Casualty Insurance Company (“Anchor”). Under the agreement, Anchor cancelled all its policies as of April 1, 2020 and HCPCI offered short-term replacement policies to those policyholders, who are under no obligation to accept them. The replacement policies had substantially the same terms and rates as the cancelled polices and would expire on the same dates the cancelled policies would have expired had they not been cancelled. Upon expiration of the replacement policies, HCPCI will offer, but is not obligated to offer, renewals to those policyholders at its own rates and terms. Total replacement policies issued by the Company on April 1, 2020 approximated 40,000. Risks and Uncertainties Caused by Novel Coronavirus (“COVID-19”) On March 11, 2020, the World Health Organization (“WHO”) declared the outbreak of COVID-19 a pandemic. COVID-19 is a respiratory illness caused by a virus that can spread from person to person. To contain the spread of COVID-19, measures have been undertaken in the United States of America and elsewhere around the world. These measures include, but are not limited to, domestic and international travel restrictions, temporary closure of nonessential businesses, cessation of public activity, and work-from-home orders, which has led to significantly reduced economic activity. To prevent the U.S. economy from further deterioration, several state and local governments have relaxed or lifted some of these measures even though infection rates remain above five percent, the level at which the WHO recommends rates fall below for at least 14 days before reopening. In Florida where the Company’s headquarters is located, a statewide stay-at-home order was issued and later lifted in May 2020. In response to the pandemic, the Company temporarily closed its offices in Florida and asked employees to work from home. The Company also closed temporarily its restaurant. Since then, some employees who have gone through the Company’s health safety training are allowed to alternate their work location between home and office. The Company quickly adjusted its technologies and infrastructure to support a remote workforce and maintain business continuity. As a provider of homeowners insurance, the Company continually prepares for disasters and catastrophic events, including events that could disrupt business continuity. On March 27, 2020, Congress passed the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which is intended to provide fast and direct economic assistance for American workers and families, small businesses, and to preserve jobs in American industries. The CARES Act includes, among other things, provisions relating to payroll tax credits and deferrals, net operating loss carryback periods, alternative minimum tax credits and technical corrections to tax depreciation methods for qualified improvement property. The Company qualifies as a small business under the CARES Act but did not apply for any of the government loan programs. At present, the Company’s insurance subsidiaries do not foresee a direct material impact from the outbreak of COVID-19 in terms of increased claims and losses. However, the resulting economic uncertainty is adversely affecting the results of the Company’s investment portfolios (See Note 5 -- Investments). The Company generally holds or invests premiums collected from policyholders in the financial markets in order to earn income before claims need to be paid. Since the economic outlook started to deteriorate, the Company’s investments in limited partnerships, equity and fixed-maturity securities have decreased in value. In addition, the Company’s insurance subsidiaries may experience difficulties collecting premiums from some policyholders. Policyholders with financial difficulties may decide not to renew insurance policies with the Company. Reinsurance companies with which the Company has contracted may also face liquidity issues and may not timely settle reinsurance balances that become due. Reinsurance costs have increased as reinsurers pay COVID-19 related claims worldwide and face the possibility of increases in the cost of capital needed to fund their operations. Furthermore, due to the impact of the COVID-19 outbreak on retail business activities, rent payments due from the Company’s lessees may be delayed or not received. Some lessees, with the exception of all anchor tenants, have sought rent concessions in order to stay in business. In the near term, the Company determined there is no impairment to its real estate investments or intangible assets as the real estate market is inherently slower moving than equity and debt security markets. For other auxiliary operations such as restaurant and marina business, the temporary closure of these operations has no material impact on the Company’s results of operations. It is too early to gauge the effectiveness of the CARES Act and any upcoming stimulus package in assisting targeted individuals and businesses and preventing further economic downturn. As of the date of issuance of these interim unaudited consolidated financial statements, the extent to which the COVID-19 pandemic may materially affect the Company's financial condition, liquidity, or results of operations in the medium and long-term future remains uncertain and unquantifiable.

Nature of Operations

6 Months Ended

Jun. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1 -- Nature of Operations

HCI Group, Inc., together with its subsidiaries (“HCI” or the “Company”), is primarily engaged in the property and casualty insurance business through two Florida domiciled insurance companies, Homeowners Choice Property & Casualty Insurance Company, Inc. (“HCPCI”) and TypTap Insurance Company (“TypTap”). HCPCI is authorized to underwrite various homeowners’ property and casualty insurance products and allied lines business in the state of Florida. HCPCI also offers flood-endorsed and wind-only policies to Florida customers and has regulatory approval to underwrite residential property and casualty insurance in the states of Arkansas, California, Maryland, North Carolina, New Jersey, Ohio, Pennsylvania, South Carolina and Texas. However, Florida is still HCPCI’s primary market. TypTap offers standalone flood and homeowners multi-peril policies. The operations of both insurance subsidiaries are supported by HCI Group, Inc. and certain HCI subsidiaries. In particular, the Company is developing technologies to collect and analyze claims and other supplemental data to generate savings and efficiency for the operations of the insurance subsidiaries. In addition, Greenleaf Capital, LLC, the Company’s real estate subsidiary, is primarily engaged in the businesses of owning and leasing real estate and operating marina facilities and one restaurant.

On February 5, 2020, HCPCI entered into a policy replacement agreement with Anchor Property & Casualty Insurance Company (“Anchor”). Under the agreement, Anchor cancelled all its policies as of April 1, 2020 and HCPCI offered short-term replacement policies to those policyholders, who are under no obligation to accept them. The replacement policies had substantially the same terms and rates as the cancelled polices and would expire on the same dates the cancelled policies would have expired had they not been cancelled. Upon expiration of the replacement policies, HCPCI will offer, but is not obligated to offer, renewals to those policyholders at its own rates and terms. Total replacement policies issued by the Company on April 1, 2020 approximated 40,000.

Risks and Uncertainties Caused by Novel Coronavirus (“COVID-19”)

On March 11, 2020, the World Health Organization (“WHO”) declared the outbreak of COVID-19 a pandemic. COVID-19 is a respiratory illness caused by a virus that can spread from person to person. To contain the spread of COVID-19, measures have been undertaken in the United States of America and elsewhere around the world. These measures include, but are not limited to, domestic and international travel restrictions, temporary closure of nonessential businesses, cessation of public activity, and work-from-home orders, which has led to significantly reduced economic activity. To prevent the U.S. economy from further deterioration, several state and local governments have relaxed or lifted some of these measures even though infection rates remain above five percent, the level at which the WHO recommends rates fall below for at least 14 days before reopening. In Florida where the Company’s headquarters is located, a statewide stay-at-home order was issued and later lifted in May 2020. In response to the pandemic, the Company temporarily closed its offices in Florida and asked employees to work from home. The Company also closed temporarily its restaurant. Since then, some employees who have gone through the Company’s health safety training are allowed to alternate their work location between home and office. The Company quickly adjusted its technologies and infrastructure to support a remote workforce and maintain business continuity. As a provider of homeowners insurance, the Company continually prepares for disasters and catastrophic events, including events that could disrupt business continuity.

On March 27, 2020, Congress passed the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which is intended to provide fast and direct economic assistance for American workers and families, small businesses, and to preserve jobs in American industries. The CARES Act includes, among other things, provisions relating to payroll tax credits and deferrals, net operating loss carryback periods, alternative minimum tax credits and technical corrections to tax depreciation methods for qualified improvement property.

The Company qualifies as a small business under the CARES Act but did not apply for any of the government loan programs.

At present, the Company’s insurance subsidiaries do not foresee a direct material impact from the outbreak of COVID-19 in terms of increased claims and losses. However, the resulting economic uncertainty is adversely affecting the results of the Company’s investment portfolios (See Note 5 -- Investments). The Company generally holds or invests premiums collected from policyholders in the financial markets in order to earn income before claims need to be paid. Since the economic outlook started to deteriorate, the Company’s investments in limited partnerships, equity and fixed-maturity securities have decreased in value.

In addition, the Company’s insurance subsidiaries may experience difficulties collecting premiums from some policyholders. Policyholders with financial difficulties may decide not to renew insurance policies with the Company. Reinsurance companies with which the Company has contracted may also face liquidity issues and may not timely settle reinsurance balances that become due. Reinsurance costs have increased as reinsurers pay COVID-19 related claims worldwide and face the possibility of increases in the cost of capital needed to fund their operations.

Furthermore, due to the impact of the COVID-19 outbreak on retail business activities, rent payments due from the Company’s lessees may be delayed or not received. Some lessees, with the exception of all anchor tenants, have sought rent concessions in order to stay in business. In the near term, the Company determined there is no impairment to its real estate investments or intangible assets as the real estate market is inherently slower moving than equity and debt security markets. For other auxiliary operations such as restaurant and marina business, the temporary closure of these operations has no material impact on the Company’s results of operations.

It is too early to gauge the effectiveness of the CARES Act and any upcoming stimulus package in assisting targeted individuals and businesses and preventing further economic downturn. As of the date of issuance of these interim unaudited consolidated financial statements, the extent to which the COVID-19 pandemic may materially affect the Company's financial condition, liquidity, or results of operations in the medium and long-term future remains uncertain and unquantifiable.