OTHER CURRENT AND NONCURRENT ASSETS: (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Other current assets
Prepaid expenses	$ 43,768	$ 40,478
Assets of non-qualified retirement plan	13,344	12,840
Other miscellaneous assets	692	2,350
Total other current assets	57,804	55,668
Other noncurrent assets
Acquired intangible assets, net	2,385	12,382	14,096
Other miscellaneous noncurrent assets	2,172	2,828
Noncurrent assets	3,697	9,724
Customer/trademark assets
Other noncurrent assets
Acquired intangible assets, net	$ 1,525	$ 6,896	$ 9,721