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Number of share options (or share units) exercised during the current period.

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Incentive and Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 01, 2011 years	Jul. 02, 2010	Jul. 01, 2011 Performance-Based Awards, Performance Shares, Units [Member]	Jul. 01, 2011 Performance-Based Awards, PARS Units [Member]	Jul. 01, 2011 Performance-Based Awards, PARS Shares [Member]	Jul. 01, 2011 Time-Based Awards, Shares [Member]	Jul. 01, 2011 Time-Based Awards, Deferred Units [Member]	Jul. 01, 2011 Shareholder Value Plan [Member]	Apr. 01, 2011 Shareholder Value Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			3 years	5 years
Terms of award			These awards, which are denominated in terms of a target number of shares, will be forfeited if performance falls below a designated threshold level and may vest for up to 250% of the target number of shares for exceptional performance. The ultimate number of shares delivered to recipients and the related compensation cost recognized as expense will be based on actual performance.
Award subject to accelerated vesting period				3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Balance, April 1, 2011			479	191	532	298	15
Granted			88	88	8	13	0
Addition from change in estimate			40	0	0	0	0
Vested			(162)	0	(81)	(4)	0
Forfeited			0	0	(8)	0	0
Balance, July 1, 2011			445	279	451	307	15
Stock Options Outstanding [Roll Forward]
Balance, April 1, 2011	220
Exercised	(40)
Balance, July 1, 2011	180
Restricted Stock Compensation Expense [Abstract]
Stock-based compensation expense	$ 1,952	$ 2,706
Income tax benefit related to stock-based compensation expense	742	1,029
Unrecognized compensation cost related to non-vested awards	22,058
Weighted average period of recognition on non-vested awards	3.4
Cash-Based Compensation, Long-Term Executive Plan [Line Items]
Performance period for cash-based incentive compensation								36-month
Accrued incentive compensation cost								$ 665	$ 10,697