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LF EQUITY INCOME FUND PORTFOLIO INVESTMENT (Tables)
6 Months Ended
Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of unrealized gains or losses
                    
   Three Months Ended   Six Months Ended 
   June 30,   June 30, 
   2021   2020   2021   2020 
   (In thousands) 
Change in fair value of equity securities - LF Fund securities  $11,097   $(1,069)  $48,273   $(1,069)
Change in fair value of equity securities derivative       6,891        6,891 
Change in fair value of equity securities forward contract       74,662        74,662 
Gain (loss) on sale of trading security - LF Fund securities   15,055    (6,110)   15,055    (6,110)
Net realized and unrealized gain on investment in LF Fund securities  $26,152   $74,374   $63,328   $74,374