Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Credit Risk Contract [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net liability $ 400,000   $ 400,000  
Settlement obligation 400,000   400,000  
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative notional amount 675,000,000   675,000,000  
Ineffective increase to interest expense 11,000 $ (99,000) (32,000) $ (1,012,000)
Estimated additional amount to be reclassified to interest expense     1,200,000  
Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of increase in the fair value of derivatives $ 0 $ 1,000 $ 0 $ 2,000