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Investments, Trading Securities (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Trading Securities [Abstract]          
Fair value, derivatives included in trading security assets $ 0   $ 0   $ 0
Fair value, derivative included in trading security liabilities 3,679   3,679   $ 12,219
Trading Revenue Charged to Net Investment Income from Trading Securities [Abstract]          
Net unrealized gains (losses) 379 $ 1,581 1,329 $ 1,581  
Net realized gains (losses) 2,056 0 20,360 (0)  
Net unrealized and realized gains (losses) $ 2,435 $ 1,581 $ 21,689 $ 1,581