Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fixed income securities, amortized cost	$ 289,712	$ 341,685
Short-term investments, amortized cost	127,588	200,506
Other Investment Not Readily Marketable, Fair Value	7,499	5,817
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Reinsurance Recoverable, Allowance for Credit Loss	$ 100	$ 100
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized	130,000,000	130,000,000
Common stock, shares issued	48,875,167	46,659,144
Common Stock, Shares, Outstanding	46,506,973
Treasury Stock, Common, Shares	2,368,194	1,463,774
Short-term Investments [Member]
Fixed income securities, amortized cost	$ 127,588	$ 200,506
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Parent Company [Member]
Fixed income securities, amortized cost	0	14,045
Short-term investments, amortized cost	64,439	155,687
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Parent Company [Member] | Short-term Investments [Member]
Fixed income securities, amortized cost	$ 64,439	$ 155,688