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Fair Value Measurements Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation liability | $ 0 | $ 0
Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | 7,172 | 6,662
Non-qualified deferred compensation liability | (4,296) | (4,140)
Derivative contracts liability | (153) |
Designated Derivative Contracts asset | 950 | 1,365
Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | 7,172 | 6,662
Non-qualified deferred compensation liability | (4,296) | (4,140)
Designated as Hedging Instrument | Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Designated Derivative Contracts asset | 950 | 1,365
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Designated Derivative Contracts asset | 950 | 1,365
Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts liability | (10) |
Designated Derivative Contracts asset | 0 | $ 0
Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts liability | (10) |
Derivatives designated as cash flow hedges | Designated as Hedging Instrument | Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts liability | (143) |
Derivatives designated as cash flow hedges | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts liability | $ (143) |

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