OTHER CURRENT AND NONCURRENT ASSETS: (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016
Other current assets
Prepaid expenses	$ 22,119	$ 25,365
Assets of non-qualified retirement plan	12,800	12,532
Other current assets	34,919	37,897
Other noncurrent assets
Acquired intangible assets, net	17,850	19,203
Deferred data acquisitions costs	1,273	1,644
Deferred expenses	1,035	883
Prepaid expenses	1,381	1,404
Other miscellaneous noncurrent assets	2,008	2,181
Noncurrent assets	$ 23,547	$ 25,315