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Derivative Instruments, Interest Rate Risk Management (Details) - USD ($)
$ in Millions
12 Months Ended
May 11, 2018
Dec. 31, 2020
Dec. 31, 2018
Derivative [Abstract]      
Repayments of debt   $ 18.5  
LIBOR [Member]      
Derivative [Abstract]      
Term of variable rate 1 month   1 month
Interest Rate Swap [Member]      
Derivative [Abstract]      
Notional amount     $ 9.0
Principal repayment term     5 years
Fixed interest rate     3.02%
Repayments of debt   0.2  
Term Loan [Member]      
Derivative [Abstract]      
Principal repayment term 5 years    
Repayments of debt   $ 9.1