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Financial Risk Management and Derivatives (Details) (USD $)					3 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013 Forward Foreign Currency Exchange Contracts [Member]	Mar. 31, 2013 Forward Foreign Currency Exchange Contracts [Member]	Jun. 30, 2013 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member]	Jun. 30, 2012 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency derivatives			$ 17,743,000	$ 17,543,000
Forward foreign currency exchange contracts					(733,000)	(91,000)
Forward foreign currency exchange contracts included in other current liabilities	50,000
Forward foreign currency exchange contracts included in prepaid expenses and other current assets		$ 683,000

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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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying 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 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative assets 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 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative liabilities 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 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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