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Derivative Financial Instruments - Impact on Interest Expense of Interest Rate Agreements Accounted for as Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Total Interest Expense	$ (64,351)	$ (27,443)	$ (154,078)	$ (72,708)
Cash Flow Hedging | Interest rate contract
Derivative [Line Items]
Net interest expense on cash flows hedges	(734)	(1,119)	(2,536)	(3,516)
Realized net losses reclassified from other comprehensive income	0	(14)	0	(42)
Total Interest Expense	$ (734)	$ (1,133)	$ (2,536)	$ (3,558)

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Amount of interest expense recognized in earnings on cash flow hedge.

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- Definition

The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

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Amount of the cost of borrowed funds accounted for as interest expense.

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