v3.25.4
SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION - SUPPLEMENTARY INSURANCE INFORMATION (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION [Abstract]      
Net Premiums Earned $ 921,184 $ 936,651 $ 882,071
Net Investment Income 52,627 44,918 40,853
Net Losses and Loss Expenses 564,332 604,118 609,178
Amortization of Deferred Policy Acquisition Costs 152,783 160,311 154,214
Other Underwriting Expenses 158,385 155,254 151,748
Net Premiums Written 904,827 942,281 895,697
Deferred Policy Acquisition Costs 68,670 73,347  
Liability For Losses and Loss Expenses 1,100,050 1,120,985  
Unearned Premiums 591,040 612,476  
Other Policy Claims and Benefits Payable 0 0  
Commercial Lines [Member]      
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION [Abstract]      
Net Premiums Earned 555,873 539,683 533,029
Net Investment Income 0 0 0
Net Losses and Loss Expenses 345,233 334,363 345,401
Amortization of Deferred Policy Acquisition Costs 92,194 92,368 94,842
Other Underwriting Expenses 95,575 89,455 93,325
Net Premiums Written 563,991 547,920 528,429
Deferred Policy Acquisition Costs 44,043 44,160  
Liability For Losses and Loss Expenses 896,541 887,820  
Unearned Premiums 379,075 368,756  
Other Policy Claims and Benefits Payable 0 0  
Personal Lines [Member]      
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION [Abstract]      
Net Premiums Earned 365,311 396,968 349,042
Net Investment Income 0 0 0
Net Losses and Loss Expenses 219,099 269,755 263,777
Amortization of Deferred Policy Acquisition Costs 60,589 67,943 59,372
Other Underwriting Expenses 62,810 65,799 58,423
Net Premiums Written 340,836 394,361 367,268
Deferred Policy Acquisition Costs 24,627 29,187  
Liability For Losses and Loss Expenses 203,509 233,165  
Unearned Premiums 211,965 243,720  
Other Policy Claims and Benefits Payable 0 0  
Investments [Member]      
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION [Abstract]      
Net Premiums Earned 0 0 0
Net Investment Income 52,627 44,918 40,853
Net Losses and Loss Expenses 0 0 0
Amortization of Deferred Policy Acquisition Costs 0 0 0
Other Underwriting Expenses 0 0 0
Net Premiums Written 0 0 $ 0
Deferred Policy Acquisition Costs 0 0  
Liability For Losses and Loss Expenses 0 0  
Unearned Premiums 0 0  
Other Policy Claims and Benefits Payable $ 0 $ 0