OTHER CURRENT AND NONCURRENT ASSETS: (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Other current assets
Prepaid expenses and other	$ 27,594	$ 25,714
Escrow deposit (see Note 3 - Acquisitions)	0	5,880
Note receivable (see Note 4 – Discontinued Operations and Dispositions)	0	4,000
Assets of non-qualified retirement plan (see Note 6 - Other Accrued Expenses)	13,551	12,716
Other current assets	41,145	48,310
Other noncurrent assets
Acquired intangible assets, net	33,922	43,884
Deferred data acquisition costs	1,036	1,116
Other miscellaneous noncurrent assets	6,510	6,443
Noncurrent assets	$ 41,468	$ 51,443