Employee Stock Benefit Plans (Schedule Of Restricted Stock Unit Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 30, 2011
Employee Stock Benefit Plans [Abstract]
Restricted Stock Units, Unvested at beginning of year	1,202
Restricted Stock Units, Granted	109
Restricted Stock Units, Vested	(137)
Restricted Stock Units, Cancelled	(50)
Restricted Stock Units, Unvested at end of year	1,124
Weighted Average Grant-Date Fair Value, Unvested at beginning of year	$ 25.73
Weighted Average Grant-Date Fair Value, Granted	$ 41.32
Weighted Average Grant-Date Fair Value, Vested	$ 36.56
Weighted Average Grant-Date Fair Value, Cancelled	$ 23.85
Weighted Average Grant-Date Fair Value, Unvested at end of year	$ 26.01