Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Designated as Hedging Instrument \| Interest Rate Swaps and Collars
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative	$ 636	$ 472	$ 4,143	$ (72)
Location of Gain or (Loss) Reclassified from Accumulated OCI into Income			Interest expense
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Net Income	299	86	$ 526	509
Not Designated as Hedging Instrument \| Foreign Currency Forward Contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in Net Income	$ (2,200)	$ 542	$ (7,570)	$ 472
Location of Gain or (Loss) Recognized in Net Income			Foreign currency (loss) gain, net

Derivative instruments income statement location of gain or loss.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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-Publisher FASB
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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.

+ References

No definition available.

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

+ References

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The income statement location of the effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

No definition available.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

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