OTHER CURRENT AND NONCURRENT ASSETS: (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2012	Mar. 31, 2013
Other current assets
Prepaid expenses	$ 41,218,000		$ 45,032,000
Assets of non-qualified retirement plan	13,900,000		13,771,000
Other miscellaneous assets	247,000		132,000
Other current assets	55,365,000		58,935,000
Other noncurrent assets
Acquired intangible assets, net	469,000	2,385,000	697,000
Deferred income tax asset			7,099,000
Other miscellaneous noncurrent assets	3,551,000		5,389,000
Noncurrent assets	3,832,000		13,052,000
Distribution from the sale of partnership's real property	3,823,000	370,000
Reduction in the carrying value of investment in the partnership	1,000,000
Customer/trademark assets
Other noncurrent assets
Acquired intangible assets, net	281,000	1,525,000	564,000
Other, net
Gain associated with the disposition of partnership's real property	$ 2,600,000