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Derivative and Other Fair Value Instruments - Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative $ 5,216 $ (4,240)
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income (14,019) (37,262)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income 0 0
Forward Starting Swaps [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative 5,216 (4,240)
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income (14,019) (37,262)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income $ 0 $ 0