Stock-Based Compensation - Performance Shares and Stock Option Plans (Details) $ / shares in Units, $ in Thousands				12 Months Ended
	Nov. 22, 2016 $ / shares shares	Nov. 24, 2015 $ / shares	Nov. 25, 2014 $ / shares	Sep. 30, 2017 USD ($) plan $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2015 USD ($)
Employee and Directors Stock Options
Information relating to stock options
Number of plans | plan				2
Number of shares authorized				1,925,000
Expiration period				10 years
Vesting of awards per year (as a percent)				33.33%
Award vesting period				3 years
Fair value assumptions
Fair Value (in dollars per share) | $ / shares	$ 11.50	$ 8.37	$ 8.17
Dividend Yield (as a percent)	2.15%	2.33%	1.90%
Risk-Free Interest Rate (as a percent)	1.79%	1.70%	0.96%
Expected Volatility (as a percent)	37.00%	30.00%	28.00%
Expected Life	5 years	5 years	3 years
Stock-based employee compensation expense | $				$ 433	$ 514	$ 534
Remaining unrecognized compensation expense | $				$ 827
Weighted average period for recognition				1 year 11 months 23 days
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)				428,401
Granted (in shares)				47,925
Canceled (in shares)				(51,000)
Outstanding at end of the period (in shares)				425,326	428,401
Vested or expected to vest (in shares)				391,469
Exercisable at end of period (in shares)				297,167
Outstanding at end of period, Aggregate Intrinsic Value | $				$ 242
Vested or expected to vest, Aggregate Intrinsic Value | $				242
Exercisable at end of the period, Aggregate Intrinsic Value | $				$ 242
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share) | $ / shares				$ 48.47
Granted (in dollars per share) | $ / shares				40.86
Exercised (in dollars per share) | $ / shares				0.00
Canceled (in dollars per share) | $ / shares				70.89
Outstanding at end of period (in dollars per share) | $ / shares				44.93	$ 48.47
Vested or expected to vest (in dollars per share) | $ / shares				44.94
Exercisable at end of the period (in dollars per share) | $ / shares				$ 46.70
Outstanding at end of the period, Weighted Average Remaining Contractual Life				5 years 7 months 6 days
Vested or expected to vest, Weighted Average Remaining Contractual Life				5 years 5 months 27 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life				4 years 5 months 1 day
Employee and Directors Stock Options | Stock Option Plan Adopted in August 2004
Information relating to stock options
Number of shares authorized				1,000,000
Employee and Directors Stock Options | Stock Option Plan Adopted in January 2007
Information relating to stock options
Number of shares authorized				500,000
Employee and Directors Stock Options | Stock Option Plan Adopted In March 2016
Information relating to stock options
Number of shares authorized				425,000
Performance Shares
Information relating to stock options
Number of shares authorized	19,000
Award vesting period	3 years
Fair value assumptions
Fair Value (in dollars per share) | $ / shares	$ 60.09
Stock-based employee compensation expense | $				$ 336
Remaining unrecognized compensation expense | $				$ 806
Weighted average period for recognition				2 years