Stock-Based Compensation - Stock Option Plans (Details) - Employee and Directors Stock Options $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 24, 2015 $ / shares shares	Nov. 25, 2014 $ / shares	Sep. 30, 2016 USD ($) plan $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($)
Information relating to stock options
Number of plans | plan			2
Number of shares authorized			1,500,000
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		$ 8.37
Dividend Yield (as a percent)		2.33%
Risk-Free Interest Rate (as a percent)		1.70%
Expected Volatility (as a percent)		30.00%
Expected Life		5 years
Stock-based employee compensation expense | $			$ 514	$ 534	$ 474
Remaining unrecognized compensation expense | $			$ 764
Weighted average period for recognition			1 year 6 months
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)			358,601
Granted (in shares)	79,800		79,800
Exercised (in shares)			(10,000)
Outstanding at end of the period (in shares)			428,401	358,601
Vested or expected to vest (in shares)			399,336
Exercisable at end of period (in shares)			279,453
Outstanding at end of period, Aggregate Intrinsic Value | $			$ 272
Vested or expected to vest, Aggregate Intrinsic Value | $			272
Exercisable at end of the period, Aggregate Intrinsic Value | $			$ 272
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share) | $ / shares			$ 50.37
Granted (in dollars per share) | $ / shares	$ 37.75		37.75
Exercised (in dollars per share) | $ / shares			31.00
Outstanding at end of period (in dollars per share) | $ / shares			48.47	$ 50.37
Vested or expected to vest (in dollars per share) | $ / shares			48.70
Exercisable at end of the period (in dollars per share) | $ / shares			$ 51.64
Outstanding at end of the period, Weighted Average Remaining Contractual Life			5 years 5 months 23 days
Vested or expected to vest, Weighted Average Remaining Contractual Life			5 years 4 months 2 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life			3 years 9 months 26 days
Stock Option Plan Adopted in August 2004
Information relating to stock options
Number of shares authorized			1,000,000
Stock Option Plan Adopted in January 2007
Information relating to stock options
Number of shares authorized			500,000