OTHER CURRENT AND NONCURRENT ASSETS: (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Other current assets
Prepaid expenses	$ 45,032	$ 43,768
Assets of non-qualified retirement plan	13,771	13,344
Other miscellaneous assets	132	692
Total other current assets	58,935	57,804
Other noncurrent assets
Acquired intangible assets, net	697	2,385	12,382
Deferred income tax asset	7,099	5,926
Other miscellaneous noncurrent assets	5,389	2,172
Other assets	13,052	9,623
Customer/trademark assets
Other noncurrent assets
Acquired intangible assets, net	$ 564	$ 1,525	$ 6,896