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Derivative Instruments and Hedging Activities - Additional Information (Details) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2013 GBP (£)
Derivative
Payments for (Proceeds from) Derivative Instrument, Financing Activities	$ 20.0
Net loss included in accumulated other comprehensive income (loss) to be reclassified into interest expense within the next 12 months		$ (0.9)
Foreign Exchange Forward | Pound Sterling Notional Amount
Derivative
Derivative, Notional Amount | £				£ 70
Foreign Exchange Forward | Euro Notional Amount
Derivative
Derivative, Notional Amount | €			€ 150

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

The net cash outflow or inflow from derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3505-108585

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