INCOME TAXES (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Apr. 03, 2010
Income Taxes [Line Items]
Foregin source income	$ 48,832,000	$ 52,041,000	$ 39,011,000
Acquisition related valuation allowance	1,569,000	3,630,000
Foreign subsidiary undistributed earnings permanently reinvested outside the US	2,300,000
Gross federal and state tax credits available	167,000,000
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
Unrecognized tax benefits	6,885,000	4,669,000	4,620,000
Unrecognized tax benefits that will impact effective tax rate	6,600,000	4,300,000
Unrecognized tax benefitsreduced by expiration of statute of limitations and settlements with taxing authoritites	2,100,000
Unrecognized tax benefits offset by establishment of reserves	200,000
Unrecognized tax positions possible change in the next twelve months	800,000
Accrued interest and penalties	1,000,000	700,000
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Foreign income tax provision	1,600,000	10,800,000	8,100,000
Foregin source income	6,200,000	31,000,000	23,200,000
United States Acquisitions [Member]
Income Taxes [Line Items]
Acquisition related operating loss carryforwards	4,700,000
Canada Acquisitions [Member]
Income Taxes [Line Items]
Acquisition related operating loss carryforwards	1,200,000
Acquisition Related Research and Development [Member]
Income Taxes [Line Items]
Acquisition related valuation allowance	400,000
Acquisition Related Net Operating Losses [Member]
Income Taxes [Line Items]
Acquisition related valuation allowance	$ 1,200,000