Stock-Based Compensation Plans (Narrative) (Details) $ / shares in Units, $ in Thousands				12 Months Ended
	Oct. 18, 2017 USD ($) employees $ / shares shares	Oct. 12, 2016 shares	Oct. 14, 2015 shares	Aug. 25, 2018 USD ($)	Aug. 26, 2017 USD ($) plans shares	Aug. 27, 2016 USD ($) shares	Aug. 29, 2015 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 2,977	$ 3,293	$ 3,097
Aggregate intrinsic value of options outstanding					400
Unrecognized compensation expense related to stock options					$ 400
Weighted average remaining contractual life for outstanding options					9 years 26 days
Options granted, shares | shares					63,800	10,000	0
Aggregate intrinsic value of awards outstanding					$ 8,400
Unrecognized compensation expense related to restricted stock awards					3,000
Total fair value of awards vested					4,900	$ 2,200	$ 4,200
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 164	$ 11	$ 0
Unrecognized compensation expense, period of recognition					2 years 2 months 12 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, period of recognition					1 year 9 months 18 days
Annual Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual incentive plan, portion paid in cash					1.000	0.667	0.667
Annual incentive plan, portion paid in restricted stock					0.000	0.333	0.333
Stock-based compensation expense					$ 3,037	$ 1,467	$ 454
Annual Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares		17,532	7,914		0
Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 86	$ 318	$ 360
Long-Term Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award					3 years
Number of plans established | plans					3
Term of sale restriction period after grant					1 year
Shares granted | shares		11,419	18,156
2014 Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized | shares					3,600,000
2014 Incentive Compensation Plan [Member] | Awards Excluding Stock Options and Stock Appreciation Rights [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized | shares					3,600,000
2014 Incentive Compensation Plan [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award					10 years
2014 Incentive Compensation Plan [Member] | Non-time-based Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					3 years
2014 Incentive Compensation Plan [Member] | Non-time-based Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					1 year
2014 Incentive Compensation Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period					3 years
Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock to directors (in shares) | shares					4,588
Aggregate intrinsic value of awards outstanding (in shares) | shares					49,729
Aggregate intrinsic value of awards outstanding					$ 1,700
Directors [Member] | 2004 Incentive Compensation Plans [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					6 months
Key Management [Member] | 2014 Incentive Compensation Plan [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					3 years
Vesting initiation period from grant date					1 year
Subsequent Event [Member] | Long-Term Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares	1,939
Subsequent Event [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of common stock on grant date | $ / shares	$ 44.40
Subsequent Event [Member] | Officers [Member] | 2014 Incentive Compensation Plan [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, shares | shares	72,710
Subsequent Event [Member] | Key Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Key Management employees | employees	75
Subsequent Event [Member] | Key Management [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares	47,680
Shares granted, value	$ 2,100
Subsequent Event [Member] | Non Management Board Members [Member] | 2014 Incentive Compensation Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares	14,980
Shares granted, value	$ 700
Subsequent Event [Member] | Forecasted stock-based comp expense [Member] | 2014 Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense				$ 1,000