Insurance Company Subsidiary Operations - Additional Information (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) Reinsurer	Dec. 31, 2021 USD ($)
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Ceded rate of premiums under insurance program	100.00%
Ceded unpaid loss	$ 34.7
Prepaid reinsurance premiums	385.4	$ 392.2
Increase (decrease) in loss and loss adjustment expense reserve	0.0
Reserve for losses and loss adjustment expense	$ 34.7
Number of reinsurers | Reinsurer	2
Premium net written	$ 27.3
Net earned premiums	$ 6.4
Wright National Flood Insurance Company
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Ceded rate of premiums under insurance program	100.00%
Expenses and allowance rate received in premiums	29.90%
Premiums written net	$ 356.1
Ceded to highly rated carriers for excess flood policies	1.3
Statutory capital and surplus required	7.5
Statutory capital and surplus	32.5	33.1
Statutory net Income	$ 0.4	1.6
Percentage of adjusted net income	100.00%
Maximum dividend payout that may be made without prior approval	$ 3.3
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	$ 354.8
Captive Insurance Facility
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Premiums written net	19.2
Premium net written	27.3
Net earned premiums	$ 6.4
Initial funding		5.9
Addition to current earnings		$ 3.8