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Fair Value Measurements Narrative (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
Deferred compensation liability, current | 575 |
Other long term liabilities | $ 3,721 |

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