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Financial Risk Management and Derivatives (Details) (USD $) |  |  |  |  | 3 Months Ended | 9 Months Ended
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Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2013 Forward Foreign Currency Exchange Contracts [Member] | Mar. 31, 2013 Forward Foreign Currency Exchange Contracts [Member] | Dec. 31, 2013 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member] | Dec. 31, 2012 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member] | Dec. 31, 2013 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member] | Dec. 31, 2012 Forward Foreign Currency Exchange Contracts [Member] General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |
Notional amount of foreign currency derivatives |  |  | $ 17,726,000 | $ 17,543,000 |  |  |  |
Forward foreign currency exchange contracts |  |  |  |  | 74,000 | 20,000 | (759,000) | 360,000
Forward foreign currency exchange contracts included in other current liabilities | 76,000 |  |  |  |  |  |  |
Forward foreign currency exchange contracts included in prepaid expenses and other current assets |  | $ 683,000 |  |  |  |  |  |

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- 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 + Details
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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 + Details
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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 + Details
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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 + Details
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