SIGNIFICANT ACCOUNTING POLICIES AND OTHER INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013 item	Mar. 31, 2012	Mar. 31, 2011
Principles of Consolidation
Number of reportable segments	1
Reclassification and Other Corrections
Reduction of current deferred tax asset and non-current deferred tax liability	$ 6,789
Cash and Cash Equivalents
Checks issued by the Company not presented to the bank for payment and included in accounts payable	38,140	42,993
Revenue Recognition and Accounts Receivable
Maximum percentage of revenue generated from single customer	0.07	0.07	0.07
Allowance for doubtful accounts	3,323	3,246
Inventories
Raw materials	24,189	24,565
Work in progress	23,676	21,345
Finished goods	7,524	8,219
Carrying value of inventories	55,389	54,129
Goodwill and Long Lived Assets
Goodwill	23,870	24,847	27,124
Trailing period of EBITDA used to measure the fair value of reporting segment	12 months
Control premium percentage used to calculate fair value of goodwill	25.00%
Impairment charges	949	1,984
Tax benefits recorded in connection with this impairment of goodwill	370	774
Schedule of goodwill
Beginning balance, gross	240,231	240,524	237,626
Accumulated impairments	(215,384)	(213,400)	(213,400)
Beginning balance, net	24,847	27,124	24,226
Acquisitions	124	(102)	2,546
Foreign exchange translation	(152)	(191)	352
Impairment charges	(949)	(1,984)
Ending balance	23,870	24,847	27,124
Impairment charge recorded against income for long-lived assets (other than goodwill and intangible assets with indefinite lives)	1,896	2,016	1,205
Other intangible assets
Net book value	11,936	15,623
Amortization expense	3,586	3,593	3,574
Future amortization expense by fiscal year
2014	3,269
2015	3,269
2016	2,162
2017	957
2018	166
Significant components of accrued liabilities
Compensation and benefits	29,639	26,920
Advances from customers	11,867	10,066
Other	16,848	17,815
Manufacturing materials and services	8,949	9,136
Sales, property and other taxes	4,671	4,559
Accrued liabilities	$ 71,974	$ 68,496
Maximum percentage of individual items of other accrued liabilities to total current liabilities	5.00%	5.00%
Minimum
Other intangible assets
Amortization period	5 years
Maximum
Other intangible assets
Amortization period	25 years