Share-based Payment Arrangements (Tables)

3 Months Ended

Mar. 31, 2012

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Amounts Recognized In The Financial Statements With Respect To Plans

	Thirteen Weeks Ended
	March 31, 2012		March 26, 2011
Total cost of the Plans during the period	$	1,525	$	1,205
Amount of related income tax benefit recognized during the period		953		305
Net cost of the Plans during the period	$	572	$	900

Weighted Average Assumptions For Option Grants

	2012			2011
Expected volatility		34.0	%		35.0	%
Expected dividend yield		0.420	%		0.450	%
Risk-free interest rate		0.90	%		1.75	%
Expected lives (in years)		4.0			4.0

Summary Of Information Regarding Stock Options

	Number of Options			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value (000s)
Options outstanding at December 31, 2011		2,326,776		$	40.11
Granted		327,500		$	51.99
Exercised		(817,040	)	$	39.68
Forfeited		(4,500	)	$	41.32
Options outstanding at March 31, 2012		1,832,736		$	42.42		6.8	$	28,048
Options exercisable at March 31, 2012		686,719		$	40.33		4.9	$	11,944

Non-Vested Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Information On Non-Vested Restricted Stock

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2011		40,993		$	42.03
Vested		(2,310	)	$	39.10
Outstanding at March 31, 2012		38,683		$	42.21