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OTHER CURRENT AND NONCURRENT ASSETS: (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Mar. 31, 2018
--- | --- | ---
Other current assets |  |
Prepaid expenses and other | $ 13,660 | $ 6,622
Assets of non-qualified retirement plan | 13,706 | 13,551
Other current assets | 27,366 | 20,173
Other noncurrent assets |  |
Acquired intangible assets, net | 26,562 | 33,922
Other miscellaneous noncurrent assets | 7,998 | 3,932
Other assets, net | $ 34,560 | $ 37,854

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