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Fair Value of Financial Instruments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.49%
Foreign Exchange Forward [Member] | Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 0	$ 0
Description of Location of Foreign Currency Derivatives on Balance Sheet	Prepaid expense other current assets	Prepaid expense other current assets
Derivative, Notional Amount	$ 0	$ 0
Foreign Exchange Forward [Member] | Liability [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Description of Location of Foreign Currency Derivatives on Balance Sheet	Accrued other liabilities	Accrued other liabilities
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 226,000	$ 1,000,000
Derivative, Notional Amount	27,385,000	27,588,000
Interest Rate Swap [Member] | Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 0	$ 0
Description of Location of Foreign Currency Derivatives on Balance Sheet	Prepaid expense other current assets	Prepaid expense other current assets
Derivative, Notional Amount	$ 0	$ 0
Interest Rate Swap [Member] | Liability [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Description of Location of Foreign Currency Derivatives on Balance Sheet	Accrued other liabilities	Accrued other liabilities
Foreign Currency Contracts, Liability, Fair Value Disclosure		$ 0
Derivative, Notional Amount	$ 31,718,750	$ 32,375,000
Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Face Amount	$ 35,000,000

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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X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Description of where the foreign currency derivatives are reported in the balance sheet.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c),(d)
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- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

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- Definition

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

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