Derivative Financial Instruments - Summary of the Fair Value Amounts of Derivative Instruments (Details) - Significant Observable Inputs (Level 2) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets	$ 2,546	$ 3,648
Derivative liabilities	3,071	1,929
Net derivative asset (liability)	(525)	1,719
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	2,546	3,648
Derivative liabilities	2,988	1,885
Designated as Hedging Instrument \| Interest Rate Swaps \| Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative assets	2,546	3,648
Designated as Hedging Instrument \| Interest Rate Swaps \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	2,988	1,885
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	83	44
Not Designated as Hedging Instrument \| Forward Currency Contracts \| Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Not Designated as Hedging Instrument \| Forward Currency Contracts \| Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 83	$ 44

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Section 50
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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.

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