XML 59 R47.htm IDEA: XBRL DOCUMENT v3.20.2
Investments - Debt Securities Available-for-sale, Unrealized Loss Position, Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis $ 261,926 $ 230,408
Investment in debt securities - Gross unrealized loss (6,872) (366)
Investments at fair value 257,990 231,685
Debt Securities due April 2058    
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis 6,498 6,855
Investment in debt securities - Gross unrealized loss (31) (9)
Investments at fair value 6,467 6,846
Debt securities due February 2057    
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis 5,624 7,324
Investment in debt securities - Gross unrealized loss (6) (1)
Investments at fair value 5,618 7,323
Debt securities due September 2059    
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis 63,693 37,843
Investment in debt securities - Gross unrealized loss (2,802) (356)
Investments at fair value 60,891 37,487
Total Basis    
Investments, Debt and Equity Securities [Line Items]    
Investment in beneficial interests - Basis 142,701 52,022
Total Gross unrealized losses    
Investments, Debt and Equity Securities [Line Items]    
Investment in beneficial interests - Gross unrealized loss (6,872) (366)
Total Carrying value (fair value)    
Investments, Debt and Equity Securities [Line Items]    
Investment in beneficial interests 135,829 $ 51,656
Debt securities due November 2059    
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis 17,367  
Investment in debt securities - Gross unrealized loss (346)  
Investments at fair value 17,021  
Debt securities due December 2059    
Investments, Debt and Equity Securities [Line Items]    
Investment in debt securities - Basis 49,519  
Investment in debt securities - Gross unrealized loss (3,687)  
Investments at fair value $ 45,832