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INVESTMENTS - Carrying Value of Commercial Mortgage Loans and Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, amortized cost $ 31,116 $ 40,967
Allowance for mortgage loan credit losses (286) (45)
Mortgage loans, net 30,830 40,922
Total mortgage loans at amortized cost | Mortgage Loans by Region    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 31,116 $ 40,967
Percent of Total 100.00% 100.00%
Total mortgage loans at amortized cost | Mortgage Loans by Region | East North Central    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 3,162 $ 3,218
Percent of Total 10.20% 7.90%
Total mortgage loans at amortized cost | Mortgage Loans by Region | Southern Atlantic    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 14,206 $ 17,021
Percent of Total 45.70% 41.40%
Total mortgage loans at amortized cost | Mortgage Loans by Region | East South Central    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 6,977 $ 7,257
Percent of Total 22.40% 17.70%
Total mortgage loans at amortized cost | Mortgage Loans by Region | New England    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 0 $ 6,588
Percent of Total 0.00% 16.10%
Total mortgage loans at amortized cost | Mortgage Loans by Region | Middle Atlantic    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 2,028 $ 2,078
Percent of Total 6.50% 5.10%
Total mortgage loans at amortized cost | Mortgage Loans by Region | Mountain    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 1,992 $ 1,992
Percent of Total 6.40% 4.90%
Total mortgage loans at amortized cost | Mortgage Loans by Region | West North Central    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 2,751 $ 2,813
Percent of Total 8.80% 6.90%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 31,116 $ 40,967
Percent of Total 100.00% 100.00%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type | Multifamily    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 8,184 $ 8,362
Percent of Total 26.30% 20.40%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type | Office    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 7,703 $ 10,615
Percent of Total 24.80% 25.90%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type | Industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 3,248 $ 9,912
Percent of Total 10.40% 24.20%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type | Retail    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 9,953 $ 10,000
Percent of Total 32.00% 24.40%
Total mortgage loans at amortized cost | Mortgage Loans by Property Type | Mixed use/Other    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, net $ 2,028 $ 2,078
Percent of Total 6.50% 5.10%
Less than 65%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, amortized cost $ 22,846 $ 32,499
65%-75%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage loans, amortized cost $ 8,270 $ 8,468