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Financial Derivatives Schedule of Options Contracts (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Financial derivatives–assets, at fair value- $ 31,752 $ 16,788
Put Option [Member]    
Derivative [Line Items]    
Remaining Years to Maturity 15 days  
Financial derivatives–assets, at fair value- $ 2,658  
Notional Amount $ 19,700  
Maturity term of derivative contract underlying options contracts 5 years  
Fixed rate on derivative underlying options contract 5.00%