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Fair Value Measurements Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Mar. 31, 2018
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | $ 7,300 | $ 7,172
Non-qualified deferred compensation liability | (4,447) | $ (4,296)
Other Assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | 7,300 |
Other Accrued Liabilities, Current | Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Accrued deferred compensation liability | 578 |
Other Long Term Liabilities | Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other long term liabilities | $ 3,869 |

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