Stock Arrangements (Details) (USD $)	12 Months Ended			0 Months Ended		12 Months Ended						1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended				12 Months Ended			1 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011	Mar. 18, 2009 Stockholders' Rights Plan	Mar. 18, 2009 Stockholders' Rights Plan Minimum	Sep. 28, 2013 Stock options Minimum	Sep. 29, 2012 Stock options Minimum	Sep. 24, 2011 Stock options Minimum	Sep. 28, 2013 Stock options Maximum	Sep. 29, 2012 Stock options Maximum	Sep. 24, 2011 Stock options Maximum	Jan. 31, 2011 Stock Incentive Plans	Sep. 28, 2013 Stock Incentive Plans Stock options	Sep. 29, 2012 Stock Incentive Plans Stock options	Sep. 24, 2011 Stock Incentive Plans Stock options	Jan. 31, 2011 Stock Incentive Plans Stock options Maximum	Sep. 28, 2013 Stock Incentive Plans Stock awards	Jan. 31, 2010 Directors' Stock Equity Plans	Sep. 28, 2013 Directors' Stock Equity Plans	Sep. 29, 2012 Directors' Stock Equity Plans	Sep. 24, 2011 Directors' Stock Equity Plans	Jan. 22, 2013 Directors' Stock Equity Plans	Sep. 28, 2013 Directors' Stock Equity Plans Stock options	Sep. 29, 2012 Directors' Stock Equity Plans Stock options	Sep. 24, 2011 Directors' Stock Equity Plans Stock options	Jan. 31, 2010 Directors' Stock Equity Plans Stock options Maximum	Sep. 28, 2013 Directors' Stock Equity Plans Stock awards	Sep. 29, 2012 Directors' Stock Equity Plans Stock awards	Sep. 24, 2011 Directors' Stock Equity Plans Stock awards	Jan. 20, 2010 Employee Stock Purchase Plan (ESPP)	Sep. 28, 2013 Employee Stock Purchase Plan (ESPP)	Sep. 29, 2012 Employee Stock Purchase Plan (ESPP)	Sep. 24, 2011 Employee Stock Purchase Plan (ESPP)	Sep. 28, 2013 Employee Stock Purchase Plan (ESPP) Minimum
Stock Arrangements
Stock-based compensation expense	$ 1,348,000	$ 1,429,000	$ 1,440,000
Related tax benefit	(476,000)	(519,000)	(517,000)
Stock-based compensation, net of tax	872,000	910,000	923,000
Unrecognized stock-based compensation cost	1,500,000
Weighted-average period over which unrecognized stock-based compensation cost is to be recognized	2 years 1 month 6 days
Stock arrangements
Number of shares authorized												600,000								300,000		600,000								637,500
Stock options expiration period																10 years										10 years
Vesting period												3 years						3 years
Shares issued in lieu of cash																			12,320	14,784	11,520
Shares
Outstanding at the beginning of the period (in shares)													371,675	587,696	518,437								239,920	200,771	206,866
Issued (in shares)													80,870	1,575	97,540								85,498	67,697	43,477
Exercised (in shares)													(521)
Cancelled (in shares)														(62,732)
Expired (in shares)													(108,230)	(154,864)	(28,281)								(36,000)	(28,548)	(49,572)
Balance at the end of the period (in shares)													343,794	371,675	587,696								289,418	239,920	200,771
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)													$ 14.86	$ 19.27	$ 21.94								$ 15.49	$ 20.20	$ 24.39
Issued (in dollars per share)													$ 11.96	$ 8.47	$ 7.40								$ 11.77	$ 11.50	$ 14.76
Exercised (in dollars per share)													$ 7.40
Cancelled (in dollars per share)														$ 11.91
Expired (in dollars per share)													$ 20.10	$ 32.70	$ 27.35								$ 26.86	$ 39.18	$ 32.89
Outstanding at the end of the period (in dollars per share)													$ 12.54	$ 14.86	$ 19.27								$ 12.98	$ 15.49	$ 20.20
Additional disclosure
Weighted Average Remaining Term													3 years 8 months 12 days										2 years 8 months 12 days
Exercisable shares													237,369										144,301
Weighted Average Exercise Price, Exercisable (in dollars per share)													$ 13.29										$ 13.97
Weighted Average Remaining Term, Exercisable													1 year 9 months 18 days										1 year 7 months 6 days
Available for future grants (in shares)													269,009										243,646								158,599
Intrinsic value for options outstanding													1,133,000										829,000
Non-vested stock grants
Outstanding at the beginning of the period (in shares)																	115,080										27,832
Awarded (in shares)																	75,828										14,931
Vested (in shares)																	30,553										13,517
Forfeited (in shares)																	100
Outstanding at the end of the period (in shares)																	160,255										29,246	27,832
Weighted-average fair value
Outstanding at the beginning of the period (in dollars per share)																	$ 9.26										$ 12.77
Awarded (in dollars per share)																	$ 11.47										$ 11.77
Vested (in dollars per share)																	$ 14.32										$ 13.16
Forfeited (in dollars per share)																	$ 8.47
Outstanding at the end of the period (in dollars per share)																	$ 9.34										$ 12.07	$ 12.77
ESPP
Purchase price expressed as a percentage of the company's common stock at the end of the grant period																																		85.00%
Increase in number of shares authorized																														300,000
Number of ESPP shares issued in period																															28,322	36,808	48,774
Average per share price of ESPP shares issued in period																															$ 11.84	$ 9.35	$ 8.46
Number of ESPP shares issued since inception																															478,901
Stockholders' Rights Plan
Initial term of Stockholders' Rights Plan				10 years
Unit expressed as a percentage of preferred stock				0.10%
Exercise price of unit				$ 100
Number of purchase rights issued per Common Share subsequently issued				1
Multiple of share market value to exercise price when purchased				2
Percentage of common stock to be acquired for rights to become exercisable					15.00%
Beneficial ownership percentage of common stock to be held by a person or a group, for rights to become exercisable					15.00%
Redemption value per right				$ 0.01
Key assumptions used to value options
Risk-free interest rate (as a percent)						1.70%	0.90%	1.00%	2.00%	1.00%	2.00%
Expected volatility (as a percent)						41.00%	49.00%	48.00%	42.00%	50.00%	49.00%
Expected dividend yield (as a percent)						7.10%	7.30%	5.70%	7.60%	11.40%	11.40%
Estimated life for grants													10 years	5 years	5 years												10 years	5 years	5 years		6 months	6 months	6 months
Weighted average fair value per share of options granted (in dollars per share)													$ 2.10	$ 1.12	$ 1.12												$ 2.05	$ 2.70	$ 3.98