Annual report pursuant to Section 13 and 15(d)

Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details)

v3.20.4
Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Credit Risk Contract [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivatives, Net liability position   $ 0          
Designated as Hedging Instrument [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Terminated notional amount         $ 145,000,000 $ 160,000,000  
Reclassification of a gain     $ 1,900,000        
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Ineffective gain (loss) in interest expense     9,000        
Notional Value $ 280,000,000   280,000,000        
Terminated notional amount 36,000   36,000        
Reclassification of a gain 25,000            
Derivatives, Net liability position $ 16,000   16,000        
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Ineffective gain (loss) in interest expense   $ 0 0 $ 200,000      
Notional Value             $ 90,000,000
Interest And Other Investment Income (Loss) [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Reclassification of a gain     $ 1,926,000 $ (204,000)