Stockholders' Equity and Stock Compensation Plans (Details 3) (USD $)	12 Months Ended															3 Months Ended	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011	Sep. 29, 2013 Restricted Stock Program	Sep. 30, 2012 Restricted Stock Program	Oct. 02, 2011 Restricted Stock Program	Sep. 29, 2013 Restricted Stock	Sep. 30, 2012 Restricted Stock	Oct. 02, 2011 Restricted Stock	Sep. 29, 2013 Performance-based restricted stock	Sep. 30, 2012 Performance-based restricted stock	Oct. 02, 2011 Performance-based restricted stock	Sep. 29, 2013 Performance-based restricted stock Minimum	Sep. 29, 2013 Performance-based restricted stock Maximum	Sep. 29, 2013 Time-based restricted stock	Jan. 01, 2012 RSUs	Sep. 29, 2013 RSUs	Sep. 30, 2012 RSUs
Stockholder's equity and stock compensation plans
Initially granted (in shares)							108,350	105,567	94,606
Granted to date (in shares)							308,523			298,523					10,000
Vesting period															3 years		4 years	4 years
Percentage of shares that ultimately vest depending on fiscal year earnings per share growth rates													0.00%	140.00%
Period of growth in earnings per share considered to calculate percentage of shares vested										3 years
Additional shares awarded based on performance-based adjustments (in shares)										4,947	5,305	8,356
Base rate percentage for performance based adjustments										100.00%
Shares available for future award (in shares)							938,114
Number of Shares
Nonvested balance at the beginning of the period (in shares)							190,000										172,000
Granted (in shares)							113,000									181,348	226,655
Vested (in shares)							(96,000)										(43,000)
Forfeited (in shares)							(4,000)										(23,000)
Nonvested balance at the end of the period (in shares)							203,000	190,000									333,140	172,000
Vested or expected to vest at the end of the period (in shares)							203,000
Weighted-Average Grant Date Fair Value
Nonvested balance at the beginning of the period (in dollars per share)							$ 23.08										$ 22.53
Granted (in dollars per share)							$ 24.23									$ 22.53	$ 24.32
Vested (in dollars per share)							$ 23.45										$ 22.53
Forfeited (in dollars per share)							$ 22.85										$ 23.27
Nonvested balance at the end of the period (in dollars per share)							$ 23.55	$ 23.08									$ 23.70	$ 22.53
Vested or expected to vest at the end of the period (in dollars per share)							$ 23.55
Restricted Stock Program
Stock-based compensation expense	$ 8,775,000	$ 10,839,000	$ 10,582,000	$ 2,200,000	$ 3,000,000	$ 1,700,000
Unrecognized compensation cost				$ 7,100,000