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Investments - Security Holdings in an Unrealized Loss Position (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value $ 71,429
Less than 12 months, Gross unrealized losses (164)
12 months or longer, Estimated fair value 47,179
12 months or longer, Gross unrealized losses (502)
Estimated fair value 118,608
Gross unrealized losses (666)
Corporate  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 6,307
Less than 12 months, Gross unrealized losses (7)
12 months or longer, Estimated fair value 9,461
12 months or longer, Gross unrealized losses (108)
Estimated fair value 15,768
Gross unrealized losses (115)
U.S. Treasury  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 35,150
Less than 12 months, Gross unrealized losses (83)
12 months or longer, Estimated fair value 14,948
12 months or longer, Gross unrealized losses (78)
Estimated fair value 50,098
Gross unrealized losses (161)
States and municipalities  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 880
Less than 12 months, Gross unrealized losses (3)
12 months or longer, Estimated fair value 0
12 months or longer, Gross unrealized losses 0
Estimated fair value 880
Gross unrealized losses (3)
Foreign  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 17,009
Less than 12 months, Gross unrealized losses (62)
12 months or longer, Estimated fair value 0
12 months or longer, Gross unrealized losses 0
Estimated fair value 17,009
Gross unrealized losses (62)
Asset-backed securities  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 1,771
Less than 12 months, Gross unrealized losses (5)
12 months or longer, Estimated fair value 1,881
12 months or longer, Gross unrealized losses (37)
Estimated fair value 3,652
Gross unrealized losses (42)
Mortgage-backed securities  
Debt Securities, Available-for-Sale [Line Items]  
Less than 12 months, Estimated fair value 10,312
Less than 12 months, Gross unrealized losses (4)
12 months or longer, Estimated fair value 20,889
12 months or longer, Gross unrealized losses (279)
Estimated fair value 31,201
Gross unrealized losses $ (283)