Investments - Held-To-Maturity by Credit Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	$ 282,894	$ 290,826
State and political subdivisions excluding Prerefunded and escrowed to maturity bonds
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	167,760	171,075
State and political subdivisions excluding Prerefunded and escrowed to maturity bonds \| AAA/Aaa
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	57,793	59,367
State and political subdivisions excluding Prerefunded and escrowed to maturity bonds \| AA/Aa
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	107,557	110,255
State and political subdivisions excluding Prerefunded and escrowed to maturity bonds \| A/A2
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	1,483	523
State and political subdivisions excluding Prerefunded and escrowed to maturity bonds \| Not rated
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	927	$ 930
Prerefunded and escrowed to maturity bonds
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
Total	$ 2,300