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Fair Value Measurements Schedule of Fair Value Assets and Liabilities (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Sep. 30, 2017 | Mar. 31, 2017
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | $ 6,984 | $ 6,662
Non-qualified deferred compensation liability | (4,128) | (4,140)
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | 6,984 | 6,662
Non-qualified deferred compensation liability | (4,128) | (4,140)
Designated as Hedging Instrument |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Designated Derivative Contracts asset |  | 1,365
Designated as Hedging Instrument | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Designated Derivative Contracts asset |  | $ 1,365
Not Designated as Hedging Instrument |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value recorded in other current liabilities | (3,177) |
Designated Derivative Contracts asset | 509 |
Not Designated as Hedging Instrument | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value recorded in other current liabilities | (3,177) |
Designated Derivative Contracts asset | 509 |
Derivatives designated as cash flow hedges | Designated as Hedging Instrument |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value recorded in other current liabilities | (5,583) |
Derivatives designated as cash flow hedges | Designated as Hedging Instrument | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value recorded in other current liabilities | $ (5,583) |

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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow 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)(1) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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