INCOME TAXES: (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Changes in the total gross unrecognized tax benefit liabilities, including accrued interest
Balance at beginning of period	$ 3,109,000	$ 3,043,000	$ 6,379,000
Additions based on tax positions related to the current year	342,000	189,000	360,000
Reduction due to expiration of statute of limitations		(94,000)	(3,460,000)
Adjustments to tax positions taken in prior years	195,000	(29,000)	(236,000)
Balance at end of period included in other liabilities	3,646,000	3,109,000	3,043,000
Interest and penalties related to unrecognized tax benefits
Interest expense and penalties	100,000
Accrued interest and penalties	600,000
U.S. federal
Operating loss carryforwards
Net operating loss carryforwards	12,500,000
State
Operating loss carryforwards
Net operating loss carryforwards	62,600,000
Valuation allowances against loss carryforwards	56,100,000
Foreign
Operating loss carryforwards
Net operating loss carryforwards	126,900,000
Foreign net operating loss carryforwards having no expiration dates	$ 123,800,000