INCOME TAXES: (Details) (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Allocation of total income tax expense (benefit)
Income from continuing operations	$ 29,129,000	$ 31,726,000	$ 32,060,000
Income from discontinued operations	19,388,000	2,351,000	539,000
Stockholder's equity:
Tax expense of stock options, warrants and restricted stock	1,310,000	316,000	683,000
Total income tax expense (benefit) allocated	49,827,000	34,393,000	33,282,000
Current:
U.S. Federal	22,919,000	10,860,000	(284,000)
Non-U.S.	295,000	176,000	351,000
State	3,687,000	2,111,000	(817,000)
Total current	26,901,000	13,147,000	(750,000)
Deferred:
U.S. Federal	900,000	19,477,000	31,641,000
Non-U.S.	2,359,000	(264,000)	(1,056,000)
State	(1,031,000)	(634,000)	2,225,000
Total deferred	2,228,000	18,579,000	32,810,000
Total	29,129,000	31,726,000	32,060,000
Earnings (loss) before income tax attributable to U.S. and non-U.S. continuing operations
U.S.	100,051,000	93,503,000	86,236,000
Non-U.S.	(33,305,000)	(93,615,000)	(10,749,000)
Earnings (loss) from continuing operations before income taxes	66,746,000	(112,000)	75,487,000
U.S. federal statutory income tax rate (as a percent)	35.00%	35.00%	35.00%
Reconciliation of income tax expense (benefit) computed using the U.S. federal statutory income tax rate of 35% of earnings before income taxes to the actual provision for income taxes for continuing operations
Computed expected tax expense (benefit)	23,361,000	(39,000)	26,420,000
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit, exclusive of benefit of reduction in valuation reserves	1,672,000	1,892,000	2,083,000
Reserves for tax items	37,000	(3,336,000)	1,015,000
Research, experimentation and other tax credits	(555,000)	(561,000)	(1,167,000)
Impairment of goodwill and intangibles not deductible for tax	5,031,000	28,006,000
Permanent differences between book and tax expense	(9,507,000)	(58,000)	1,967,000
Non-U.S. subsidiaries taxed at other than 35%, including adjustments to valuation reserves	8,887,000	4,409,000	1,655,000
Adjustment to U.S. valuation reserves	(619,000)	1,312,000	(1,149,000)
Other, net	822,000	101,000	1,236,000
Total	29,129,000	31,726,000	32,060,000
Reconciliation of income tax expense (benefit) computed using the U.S. federal statutory income tax rate of 35% of earnings before income taxes to the actual provision for income taxes for discontinued operations
Computed expected tax expense (benefit)	18,650,000	2,012,000	445,000
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit, exclusive of benefit of reduction in valuation reserves	737,000	187,000	41,000
Other, net	1,000	152,000	53,000
Total	19,388,000	2,351,000	539,000
Foreign jurisdiction
INCOME TAXES
Change in valuation allowance	$ 5,200,000