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Stock-based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Mar. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of common stock shares authorized to issue	2,926,408		2,926,408
Common stock, par value	$ 0.001		$ 0.001		$ 0.001
Stock-based compensation expense	$ 1,735	$ 2,046	$ 4,606	$ 5,418
Tax benefit from stock-based compensation expense	$ 638	$ 751	$ 1,693	$ 1,988

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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