Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Significant Accounting Policies [Line Items]
Net investment in foreign subsidiaries	56,400,000	45,500,000
Potential loss due to 10% adverse change in foreign exchange rates	5,600,000	4,600,000
Letters of credit, amount		19,500,000
Restricted cash and cash equivalents		22,300,000
Minority equity investment	8,966,000	8,966,000
Cumulative translation adjustment	400,000	600,000
Top ten customers | Net sales
Significant Accounting Policies [Line Items]
Customer concentration risk, percentage	61.00%	56.00%	62.00%
Individually significant customer | Net sales
Significant Accounting Policies [Line Items]
Customer concentration risk, percentage	31.00%	29.00%	24.00%
Other significant customers | Net sales
Significant Accounting Policies [Line Items]
Customer concentration risk, percentage			11.00%
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	1 year
Minimum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	10 years
Minimum | Other intangible assets
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	1 year
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	9 years
Maximum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	17 years
Maximum | Other intangible assets
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	9 years
Omni Guide, Inc.
Significant Accounting Policies [Line Items]
Minority equity investment	9,000,000	0
Omni Guide, Inc. | Class D Preferred Stock
Significant Accounting Policies [Line Items]
Minority equity investment	6,000,000	0
Omni Guide, Inc. | Class E Preferred Stock
Significant Accounting Policies [Line Items]
Minority equity investment	3,000,000	0
SINGAPORE
Significant Accounting Policies [Line Items]
Cumulative amount of earnings upon which U.S. income taxes have not been provided	25,800,000	20,900,000
Unrecognized deferred tax liability	9,000,000	7,300,000
401(k) plan
Significant Accounting Policies [Line Items]
Contributions to 401(k) during the period	300,000	300,000