Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Aug. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]              
Collateral for fair value of assets $ 0 $ 0          
Credit Risk Contract [Member]              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivatives, Net liability position 0 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 $ 200,000 $ 37,000      
Estimated additional amount to be reclassified to interest expense   16,000          
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) $ (37,000)