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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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative [Line Items]
Total Interest Expense	$ (48,213)	$ (24,234)	$ (89,727)	$ (45,265)
Cash Flow Hedging | Interest rate contract
Derivative [Line Items]
Net interest expense on cash flows hedges	(804)	(1,172)	(1,802)	(2,397)
Realized net losses reclassified from other comprehensive income	0	(14)	0	(28)
Total Interest Expense	$ (804)	$ (1,186)	$ (1,802)	$ (2,425)

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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