Compensation Plans (Tables)

3 Months Ended

Dec. 28, 2013

Compensation Plans

Schedule of assumptions used in estimating the grant-date fair value of employee stock options and similar instruments

	Thirteen weeks ended
	December 28, 2013			December 29, 2012
Average expected life	5.5 years			6.0 years
Average volatility	75		%	81		%
Dividend yield	1.33		%	—		%
Risk-free interest rate	1.69		%	0.84		%
Weighted average fair value	$	40.98		$	22.66

Schedule of assumptions used in estimating the grant-date fair value of employees' purchase rights under Employee Stock Purchase Plan

	Thirteen weeks ended
	December 28, 2013			December 29, 2012
Average expected life	6 months			6 months
Average volatility	55		%	114		%
Dividend yield	1.34		%	—		%
Risk-free interest rate	0.04		%	0.14		%
Weighted average fair value	$	22.57		$	10.82