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FAIR VALUE OF FINANCIAL INSTRUMENTS - Financial Instruments Measured at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale $ 2,205,350 $ 1,868,331
Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 2,205,350 1,868,331
Short-Term Investments   100
Corporate-Owned Life Insurance 13,462 13,003
Total 2,263,563 1,904,532
Recurring | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money Market Accounts 44,751 23,098
Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 26,568 30,914
Short-Term Investments   100
Corporate-Owned Life Insurance 0 0
Total 71,319 54,112
Recurring | Level 1 | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money Market Accounts 44,751 23,098
Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 2,178,782 1,837,417
Short-Term Investments   0
Corporate-Owned Life Insurance 13,462 13,003
Total 2,192,244 1,850,420
Recurring | Level 2 | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money Market Accounts 0 0
Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Short-Term Investments   0
Corporate-Owned Life Insurance 0 0
Total 0 0
Recurring | Level 3 | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money Market Accounts 0 0
Recurring | US Treasury and government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 104,104 117,301
Recurring | US Treasury and government agencies | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 26,568 30,914
Recurring | US Treasury and government agencies | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 77,536 86,387
Recurring | US Treasury and government agencies | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | States, municipalities and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 261,734 247,904
Recurring | States, municipalities and political subdivisions | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | States, municipalities and political subdivisions | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 261,734 247,904
Recurring | States, municipalities and political subdivisions | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Corporate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 783,154 689,382
Recurring | Corporate | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0
Recurring | Corporate | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 783,154 689,382
Recurring | Corporate | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Residential mortgage-backed    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 715,597 583,411
Recurring | Residential mortgage-backed | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Residential mortgage-backed | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 715,597 583,411
Recurring | Residential mortgage-backed | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Commercial mortgage-backed    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 145,407 103,554
Recurring | Commercial mortgage-backed | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Commercial mortgage-backed | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 145,407 103,554
Recurring | Commercial mortgage-backed | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0 0
Recurring | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 195,354 126,779
Recurring | Asset-backed securities | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 0
Recurring | Asset-backed securities | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale 195,354 126,779
Recurring | Asset-backed securities | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Fixed Maturity, Available-for-Sale $ 0 $ 0