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Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 5,896,000	$ 9,540,000	$ 10,294,000	$ 15,439,000
Decrease in provision for income taxes	$ (3,600,000)		$ (5,100,000)
Effective tax rate	31.50%	36.90%	32.20%	36.80%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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