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Financial Instruments - Schedule Of Expected Deferred Gains (Losses) Recognition (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Derivative [Line Items]  
Interest Rate Agreements $ (47,705)
Next twelve months  
Derivative [Line Items]  
Interest Rate Agreements (1,878)
Thereafter  
Derivative [Line Items]  
Interest Rate Agreements $ (45,827)