Description of Business and Summary of Significant Accounting Policies - Concentrations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) item
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of commercial banks | item	4
Percentage of insurance subsidiary's total insurance receivables	39.00%
Restricted cash equivalents | $	$ 29.1
Cash and Cash Equivalents
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash in bank | $	$ 262.0
Accounts Receivable | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of reinsurers | item	1
Revenue Benchmark | Geographic Concentration Risk | Customers in Texas
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Insurance related revenues percentage	62.00%
Revenue Benchmark | Geographic Concentration Risk | Customers in South Carolina
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Insurance related revenues percentage	10.00%