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OTHER CURRENT AND NONCURRENT ASSETS: (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Mar. 31, 2018
--- | --- | ---
Other current assets |  |
Prepaid expenses and other | $ 7,973 | $ 6,622
Assets of non-qualified retirement plan | 15,223 | 13,551
Other current assets | 23,196 | 20,173
Other noncurrent assets |  |
Acquired intangible assets, net | 28,969 | 33,922
Other miscellaneous noncurrent assets | 7,512 | 3,932
Other assets, net | $ 36,481 | $ 37,854

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