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17. LF Equity Income Fund Portfolio Investment (Tables)
12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Schedule of unrealized gains or losses
   Years Ended 
   December 31, 
   2020   2019 
   (In thousands) 
Change in fair value of trading security - LF Fund public securities  $72,104   $ 
Change in fair value of investment security - LF Fund private securities   103,751     
Loss on sale of trading security - LF Fund public securities   (3,930)    
Gain on sale of prepaid investment and derivative   2,845     
    Net realized and unrealized gain on investment in LF Fund securities  $174,770   $