INCOME TAXES: (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Allocation of total income tax expense (benefit)
Income from continuing operations	$ 33,058,000	$ 29,129,000	$ 31,726,000
Income from discontinued operations		19,388,000	2,351,000
Stockholder's equity:
Tax impact of stock options, warrants and restricted stock	(357,000)	1,310,000	316,000
Total income tax expense (benefit) allocated	32,701,000	49,827,000	34,393,000
Current:
U.S. Federal	32,782,000	22,919,000	10,860,000
Non-U.S.	716,000	295,000	176,000
State	3,138,000	3,687,000	2,111,000
Total current	36,636,000	26,901,000	13,147,000
Deferred:
U.S. Federal	(3,874,000)	900,000	19,477,000
Non-U.S.	(574,000)	2,359,000	(264,000)
State	870,000	(1,031,000)	(634,000)
Total deferred	(3,578,000)	2,228,000	18,579,000
Total	33,058,000	29,129,000	31,726,000
Earnings (loss) before income tax attributable to U.S. and non-U.S. continuing operations
U.S.	89,791,000	100,051,000	93,503,000
Non-U.S.	386,000	(33,305,000)	(93,615,000)
Earnings (loss) from continuing operations before income taxes	90,177,000	66,746,000	(112,000)
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)	31,562,000	23,361,000	(39,000)
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit	1,631,000	1,672,000	1,892,000
Research, experimentation and other tax credits	(1,408,000)	(518,000)	(3,897,000)
Impairment of goodwill and intangibles not deductible for tax		5,031,000	28,006,000
Permanent differences between book and tax expense	(481,000)	(9,507,000)	(58,000)
Non-U.S. subsidiaries taxed at other than 35%	1,761,000	3,670,000	4,409,000
Adjustment to valuation allowances	726,000	4,598,000	1,312,000
Other, net	(733,000)	822,000	101,000
Total	33,058,000	29,129,000	31,726,000
INCOME TAXES
Change in valuation allowance		4,600,000
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	2,011,000
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
Other, net		1,000	153,000
Total		19,388,000	2,351,000
State jurisdiction
INCOME TAXES
Change in valuation allowance	700,000
Foreign jurisdiction
INCOME TAXES
Change in valuation allowance		$ 5,200,000