Fair Value Measurements - Additional Information (Details) (USD $)	Jun. 29, 2013	Mar. 30, 2013
Schedule of Available-for-sale Securities
Cost Method Investments	$ 8,966,000	$ 8,966,000
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	69,200,000
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	12,300,000
Omni Guide, Inc.
Schedule of Available-for-sale Securities
Cost Method Investments	9,000,000
Percentage Of Ownership Interests	11.00%
Cost Method Investment Preferred Stock Class D [Member] \| Omni Guide, Inc.
Schedule of Available-for-sale Securities
Cost Method Investments	6,000,000
Cost Method Investment Preferred Stock Class E [Member] \| Omni Guide, Inc.
Schedule of Available-for-sale Securities
Cost Method Investments	$ 3,000,000

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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- Definition

This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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