Share-Based Payment Arrangements (Schedule Of Information On Non-Vested Restricted Stock) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Share-Based Payment Arrangements [Abstract]
Non-vested restricted stock outstanding at December 25, 2010, Number of Shares	29,854
Non-vested restricted stock outstanding at December 25, 2010, Weighted Average Grant Date Fair Value	$ 39.49
Granted, Number of Shares	22,410
Granted, Weighted Average Grant Date Fair Value	$ 44.82
Vested, Number of shares	(8,333)
Vested, Weighted Average Grant Date Fair Value	$ 42.14
Forfeited, Number of shares	(2,938)
Forfeited, Weighted Average Grant Date Fair Value	$ 37.13
Non-vested restricted stock outstanding at December 31, 2011, Number of Shares	40,993
Non-vested restricted stock outstanding at December 31, 2011, Weighted Average Grant Date Fair Value	$ 42.03