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

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

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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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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Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4D

-Subparagraph (a)(2)

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Fair value of financial and nonfinancial obligations.

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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets:
Foreign currency forward exchange contracts		$ 16
Liabilities:
Foreign currency forward exchange contracts		109
Gain (loss) on forward exchange contracts	2,384	1,068	1,026
Notional amount of foreign currency derivatives	34,631invest_DerivativeNotionalAmount	30,280invest_DerivativeNotionalAmount
Fair Value
Assets:
Foreign currency forward exchange contracts	130
Total Assets	130
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	0
Level 1
Assets:
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	0
Level 2
Assets:
Foreign currency forward exchange contracts	130
Total Assets	130
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	0
Level 3
Assets:
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	$ 0