Derivatives and Hedging Activities - Schedule of Derivatives in Statement of Financial Position, Fair Value (Details) - Significant Other Observable Inputs Level 2 - Swap - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, at fair value	$ (15,255)	$ (5,461)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, at fair value	4,158	5,245
GBP \| Interest rate swaps, net (GBP & EUR) \| Designated as Hedging Instrument \| Derivatives assets, at fair value
Derivatives, Fair Value [Line Items]
Derivatives assets, at fair value	0	567
GBP \| Interest rate swaps, net (GBP & EUR) \| Designated as Hedging Instrument \| Derivatives liabilities, at fair value
Derivatives, Fair Value [Line Items]
Derivatives liabilities, at fair value	(10,486)	(3,313)
GBP \| Foreign currency forwards, net (GBP & EUR) \| Not Designated as Hedging Instrument \| Derivatives assets, at fair value
Derivatives, Fair Value [Line Items]
Derivatives assets, at fair value	3,055	1,090
GBP \| Cross currency swaps, net (GBP & EUR) \| Not Designated as Hedging Instrument \| Derivatives assets, at fair value
Derivatives, Fair Value [Line Items]
Derivatives assets, at fair value	683	509
EUR \| Interest rate swaps, net (GBP & EUR) \| Designated as Hedging Instrument \| Derivatives liabilities, at fair value
Derivatives, Fair Value [Line Items]
Derivatives liabilities, at fair value	(4,769)	(2,715)
EUR \| Interest rate swaps, net (GBP & EUR) \| Not Designated as Hedging Instrument \| Derivatives liabilities, at fair value
Derivatives, Fair Value [Line Items]
Derivatives liabilities, at fair value	(838)	0
EUR \| Foreign currency forwards, net (GBP & EUR) \| Not Designated as Hedging Instrument \| Derivatives assets, at fair value
Derivatives, Fair Value [Line Items]
Derivatives assets, at fair value	336	1,113
EUR \| Cross currency swaps, net (GBP & EUR) \| Not Designated as Hedging Instrument \| Derivatives assets, at fair value
Derivatives, Fair Value [Line Items]
Derivatives assets, at fair value	$ 922	$ 2,533

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No definition available.

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

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