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Note 10 - Reserve for Losses and Loss Adjustment Expenses - Schedule of Incurred Losses and Allocated Loss Adjustment Expenses on Homeowners' Insurance (Details) - Homeowners Insurance Product Line [Member]
$ in Thousands
Dec. 31, 2025
USD ($)
Claims
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] $ 361,571                  
Insurance contracts, incurred but not reported liabilities [1] $ 60,400                  
Insurance contracts, number of claims | Claims [1] 46,588                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 282,236                  
Reserve for losses and loss adjustment expense, net of reinsurance [1] 79,335                  
Short-Duration Insurance Contracts, Accident Year 2016 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 5,737 $ 5,730 $ 5,730 $ 7,125 $ 7,062 $ 7,075 $ 7,090 $ 6,972 $ 7,127 $ 7,450
Insurance contracts, incurred but not reported liabilities [1] $ 0                  
Insurance contracts, number of claims | Claims [1] 1,384                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 5,737 5,729 5,729 7,125 7,062 7,072 7,051 6,801 6,420 $ 4,823
Short-Duration Insurance Contracts, Accident Year 2017 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 11,980 11,978 12,339 10,668 10,561 10,652 10,644 10,893 12,425  
Insurance contracts, incurred but not reported liabilities [1] $ 0                  
Insurance contracts, number of claims | Claims [1] 3,624                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 11,980 11,978 12,339 10,636 10,560 10,640 10,639 10,719 $ 9,102  
Short-Duration Insurance Contracts, Accident Year 2018 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 7,978 7,978 8,010 7,941 7,950 7,939 8,103 8,163    
Insurance contracts, incurred but not reported liabilities [1] $ 0                  
Insurance contracts, number of claims | Claims [1] 1,198                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 7,979 7,978 7,999 7,943 7,943 7,931 7,889 $ 4,409    
Short-Duration Insurance Contract, Accident Year 2019 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 4,372 4,365 4,350 4,293 3,947 4,223 4,575      
Insurance contracts, incurred but not reported liabilities [1] $ 0                  
Insurance contracts, number of claims | Claims [1] 1,690                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 4,372 4,365 4,345 4,170 3,757 3,510 $ 2,179      
Short-Duration Insurance Contract, Accident Year 2020 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 57,114 56,859 56,008 59,565 57,248 61,434        
Insurance contracts, incurred but not reported liabilities [1] $ 5                  
Insurance contracts, number of claims | Claims [1] 5,161                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 57,086 56,712 55,619 55,504 49,222 $ 31,862        
Short-Duration Insurance Contract, Accident Year 2021 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 26,798 27,902 25,733 25,158 29,836          
Insurance contracts, incurred but not reported liabilities [1] $ 212                  
Insurance contracts, number of claims | Claims [1] 5,124                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 26,358 26,466 24,408 22,500 $ 11,355          
Short-Duration Insurance Contract, Accident Year 2022 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 39,443 42,358 44,943 42,887            
Insurance contracts, incurred but not reported liabilities [1] $ 2,458                  
Insurance contracts, number of claims | Claims [1] 4,151                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 35,914 35,271 30,042 $ 12,647            
Short-Duration Insurance Contract, Accident Year 2023 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 32,442 36,587 40,921              
Insurance contracts, incurred but not reported liabilities [1] $ 1,533                  
Insurance contracts, number of claims | Claims [1] 4,789                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 28,855 26,378 $ 14,226              
Short-Duration Insurance Contract, Accident Year 2024 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 62,179 77,421                
Insurance contracts, incurred but not reported liabilities [1] $ 13,324                  
Insurance contracts, number of claims | Claims [1] 8,636                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 45,154 $ 32,850                
Short-Duration Insurance Contract, Accident Year 2025 [Member]                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Insurance contracts, claim expense [1] 113,528                  
Insurance contracts, incurred but not reported liabilities [1] $ 42,868                  
Insurance contracts, number of claims | Claims [1] 10,831                  
Insurance contracts, claims paid and allocated claim adjustment expense [1] $ 58,801                  
[1] Data presented for these calendar years is required supplementary information, which is unaudited.