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Insurance Company Subsidiary Operations - Additional Information (Details) $ in Millions |  | 1 Months Ended | 6 Months Ended | 12 Months Ended | 19 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 28, 2023 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2023 USD ($) Reinsurer | Dec. 31, 2022 USD ($) | Jun. 30, 2023 USD ($)
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Ceded rate of premiums under insurance program |  |  | 100.00% |  | 100.00%
Ceded unpaid loss |  |  | $ 184.6 |  | $ 184.6
Prepaid reinsurance premiums |  |  | 450.6 | $ 393.2 | 450.6
Increase (decrease) in loss and loss adjustment expense reserve |  |  | 0.0 |  |
Reinsurance recoverable |  |  | 187.2 | 831.0 | 187.2
Reserve for losses and loss adjustment expense |  |  | $ 184.6 |  | 184.6
Number of reinsurers | Reinsurer |  |  | 2 |  |
Premium net written |  |  | $ 34.9 |  |
Net earned premiums |  |  | 21.7 |  |
Ultimate loss reserve expense inclusive of IBNR claims |  |  | 198.8 | 841.1 | 198.8
Hurricane Ian |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Reinsurance recoverable |  |  | 2.7 |  | 2.7
Reinsurance recoverable for net expected loss |  |  | 4.9 |  | 4.9
Loss reserve inclusive of IBNR claims |  |  | 7.6 |  | 7.6
Reported insured losses |  |  | $ 2.1 |  | $ 2.1
Wright National Flood Insurance Company |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Ceded rate of premiums under insurance program |  |  | 100.00% |  | 100.00%
Prepaid reinsurance premiums |  |  | $ 416.0 |  | $ 416.0
Expenses and allowance rate received in premiums |  |  | 29.70% |  | 29.70%
Premiums written net |  |  | $ 412.1 |  |
Ceded to highly rated carriers for excess flood policies |  |  | 1.5 |  |
Statutory capital and surplus required |  |  | 7.5 |  | $ 7.5
Statutory capital and surplus |  |  | 38.0 | 31.8 | $ 38.0
Statutory net Income |  |  | $ 7.8 | $ 1.3 |
Percentage of adjusted net income |  |  | 100.00% |  | 100.00%
Maximum dividend payout that may be made without prior approval |  |  | $ 3.2 |  | $ 3.2
Dividend paid | $ 3.1 |  |  |  |
Wright National Flood Insurance Company | Maximum |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Preferred stock, dividend rate, percentage |  |  | 10.00% |  |
Wright National Flood Insurance Company | FEMA |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Premiums written net |  |  | $ 410.6 |  |
Quota Share Captive |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Prepaid reinsurance premiums |  |  | 34.6 |  | 34.6
Deferred acquisitions costs |  |  | 31.6 |  | 31.6
Reinsurance payable |  |  | 17.0 |  | 17.0
Reserve for losses and loss adjustment expense |  |  | 7.9 |  | 7.9
Premiums written net |  |  | 41.0 |  |
Premium net written |  |  | 33.3 |  |
Net earned premiums |  |  | 20.1 |  |
Initial funding |  | $ 5.9 |  |  |
Addition to current earnings |  |  |  |  | 18.3
Ultimate loss reserve expense inclusive of IBNR claims |  |  | 9.3 |  | 9.3
Captive Insurance Facility |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Reserve for losses and loss adjustment expense |  |  | 6.3 |  | 6.3
Net earned premiums |  |  | 1.6 |  |
Maximum underwriting exposure |  |  | 3.0 |  |
Captive Insurance Facility | Hurricane Ian |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |
Reserve for losses and loss adjustment expense |  |  | $ 6.0 |  | $ 6.0

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