Stock-Based Compensation - Performance Shares and Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Jun. 01, 2018	Nov. 21, 2017	Nov. 22, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Mar. 01, 2016
Employee and Directors Stock Options
Information relating to stock options
Number of shares authorized				1,925,000		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)	$ 13.92	$ 9.74	$ 11.50
Dividend Yield (as a percent)	2.07%	2.77%	2.15%
Risk-Free Interest Rate (as a percent)	2.68%	2.06%	1.79%
Expected Volatility (as a percent)	41.00%	42.00%	37.00%
Expected Life	5 years	5 years	5 years
Stock-based employee compensation expense				$ 135	$ 105	$ 396	$ 329
Remaining unrecognized compensation expense				$ 760		$ 760
Weighted average period for recognition						11 months 9 days
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)						425,326
Granted (in shares)						72,550
Canceled (in shares)						(90,467)
Outstanding at end of the period (in shares)				407,409		407,409
Vested or expected to vest (in shares)				339,282		339,282
Exercisable at end of period (in shares)				316,776		316,776
Outstanding at end of period, Aggregate Intrinsic Value				$ 450		$ 450
Vested or expected to vest, Aggregate Intrinsic Value				440		440
Exercisable at end of the period, Aggregate Intrinsic Value				$ 263		$ 263
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share)						$ 44.93
Granted (in dollars per share)						34.00
Exercised (in dollars per share)						0.00
Canceled (in dollars per share)						45.79
Outstanding at end of period (in dollars per share)				$ 43.72		43.72
Vested or expected to vest (in dollars per share)				42.66		42.66
Exercisable at end of the period (in dollars per share)				$ 44.51		$ 44.51
Outstanding at end of the period, Weighted Average Remaining Contractual Life						5 years 11 months 1 day
Vested or expected to vest, Weighted Average Remaining Contractual Life						6 years 22 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life						5 years 26 days
Employee and Directors Stock Options | Mr. Shor
Activity under stock option plans, number of shares
Granted (in shares)						15,000
Employee and Directors Stock Options | Maximum | Mr. Shor
Information relating to stock options
Award vesting period						1 year
Employee and Directors Stock Options | Stock Option Plan Adopted in August 2004
Information relating to stock options
Number of shares authorized				1,000,000		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		500,000
Stock Options and Stock Appreciation Rights
Information relating to stock options
Number of shares authorized								425,000
Performance Shares
Activity under stock option plans, number of shares
Forfeited (in share)					11,910
Performance Shares | Certain Employees
Information relating to stock options
Number of shares authorized		24,800	19,000
Award vesting period		3 years	3 years
Fair value assumptions
Stock-based employee compensation expense				$ 116	$ 101	$ 430	$ 235
Remaining unrecognized compensation expense				$ 820		$ 820
Weighted average period for recognition						1 year 8 months 16 days
Weighted Average Exercise Prices
Granted (in dollars per share)		$ 38.43	$ 60.09