Annual report pursuant to Section 13 and 15(d)

Derivative Instruments And Hedging Strategies (Narrative) (Details)

v3.20.4
Derivative Instruments And Hedging Strategies (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]      
Derivative gains (losses) on cash flow hedges $ 957 $ (67) $ 0
Cash Flow Hedging | Interest Rate Swap      
Derivatives, Fair Value [Line Items]      
Derivative gains (losses) on cash flow hedges 1,000    
Cash Flow Hedging | Interest Rate Swap | RF Vessel Holdings      
Derivatives, Fair Value [Line Items]      
Derivative, Notional Amount $ 48,000    
Derivative, fixed interest rate 1.74%