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Fair Value Measurements Narrative (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Mar. 31, 2020
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | $ 7,889 | $ 6,164
Non-qualified deferred compensation liability | 5,490 | $ 3,756
Other Assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-qualified deferred compensation asset | 7,889 |
Other Accrued Liabilities, Current |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Current deferred compensation liability | 715 |
Other Long Term Liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Noncurrent deferred compensation liability | $ 4,775 |

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