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	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative	$ (33,765)	$ 11,995
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	(8,902)	(9,307)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income		0
Forward Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative	(33,765)	11,995
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	$ (8,902)	(9,307)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income		$ 0