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Reinsurance - General Information (Details) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) Counterparty	Dec. 31, 2021 USD ($) Counterparty	Dec. 31, 2020 USD ($) Counterparty	Jun. 30, 2022 USD ($)
Reinsurance Retention Policy
Retention amount			$ 10,700	$ 10,900
Number of Company's largest reinsurers | Counterparty			3	3	3
Reinsurance premiums ceded			$ 378,806	$ 200,172	$ 146,388
Percentage of reinsurance premiums ceded on total premium			23.90%	20.90%	22.40%
Percentage of reinsurance recoverable on paid and unpaid losses on total balance			31.50%	19.30%
Ceded unearned premiums			$ 204,084	$ 58,315
Ceded written premiums			524,575	223,443	$ 155,102
Catastrophe bond, face value						$ 275,000
Catastrophe
Reinsurance Retention Policy
Retention amount			12,500
Ceded written premiums			28,300	11,700	5,000
Catastrophe bond, issuance costs		$ 400,000
Earthquake
Reinsurance Retention Policy
XOL reinsurance, protection			2,110,000
Hawaii Hurricane
Reinsurance Retention Policy
XOL reinsurance, protection			1,010,000
U.S. Hurricane
Reinsurance Retention Policy
XOL reinsurance, protection			250,000
Minimum | Hurricane and earthquake
Reinsurance Retention Policy
Retention amount			5,000
Maximum | Hurricane and earthquake
Reinsurance Retention Policy
Retention amount			15,000
Torrey Pines Re Ltd. ("TPRe") | Catastrophe
Reinsurance Retention Policy
Notes issued for reinsurance coverage	$ 166,000
First largest insurer
Reinsurance Retention Policy
Reinsurance premiums ceded			24,700	24,700	9,700
Reinsurance recoverables on paid and unpaid losses			60,600	21,900
Second largest insurer
Reinsurance Retention Policy
Reinsurance premiums ceded			22,900	11,700	8,600
Reinsurance recoverables on paid and unpaid losses			53,900	10,500
Third largest insurer
Reinsurance Retention Policy
Reinsurance premiums ceded			18,400	10,400	$ 6,000
Reinsurance recoverables on paid and unpaid losses			$ 50,600	$ 9,200

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The number of Company's largest reinsurers.

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The percentage of reinsurance premiums ceded on total premium.

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The percentage of reinsurance recoverable on paid and unpaid losses on total balance.

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Amount of earned premiums ceded to other entities.

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Amount, after valuation allowance, recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, policy benefits and policy reserves. Excludes premiums paid under reinsurance contracts.

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Amount per event of risk undertaken originally by insurer that is not ceded to reinsurer.

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