Share-Based Compensation Plans (Narrative) (Details)		1 Months Ended	3 Months Ended				6 Months Ended		12 Months Ended					24 Months Ended	36 Months Ended
	Jan. 23, 2015 shares	Apr. 30, 2014 USD ($) $ / shares shares	Aug. 31, 2015 USD ($) item $ / shares shares	Nov. 30, 2013 item shares	Mar. 02, 2013 USD ($) shares	Dec. 01, 2012 item shares	Aug. 31, 2013 shares	Mar. 02, 2013 shares	Aug. 31, 2015 USD ($) employee item $ / shares shares	Aug. 31, 2014 USD ($) employee $ / shares shares	Aug. 31, 2013 USD ($) employee shares	Aug. 31, 2012 item shares	Aug. 31, 2011 USD ($) $ / shares	Aug. 31, 2011 item $ / shares	Aug. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued from treasury stock										134,614
Shares withheld for tax, value | $										$ 300,000
Shares withheld for tax										17,935
Capitalized share-based compensation expense | $															$ 0
Shares vested									14,616
Number of tranches | item									0
Exercise price | $ / shares			$ 11.41						$ 11.41	$ 11.41					$ 11.41
Number of shares									24,210
Share-based compensation expense | $									$ 2,536,000	$ 3,534,000	$ 3,589,000
Stock options exercised
Aggregate intrinsic value | $			$ 3,361,000						$ 3,361,000						$ 3,361,000
Fiscal 2011 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			$ 17.00						$ 17.00						$ 17.00
Average share price | $ / shares			11.34						$ 11.34						11.34
Number of shares									294,158
Fiscal 2012 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			18.05						$ 18.05						18.05
Average share price | $ / shares			9.55						$ 9.55						9.55
Number of shares									177,616
Fiscal 2013 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			22.00						$ 22.00						22.00
Average share price | $ / shares			16.03						$ 16.03						16.03
Number of shares									120,101
Fiscal 2014 Grant 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			22.00						$ 22.00						22.00
Average share price | $ / shares			19.68						$ 19.68						19.68
Number of shares									8,352
Fiscal 2014 Grant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average share price | $ / shares			20.01						$ 20.01						20.01
Number of shares									13,477
Share-based compensation expense | $		$ 200,000
Minimum [Member] | Fiscal 2014 Grant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			18.05						$ 18.05						18.05
Maximum [Member] | Fiscal 2014 Grant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares			$ 22.00						$ 22.00						$ 22.00
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $			$ 0						$ 0						$ 0
Number of tranches | item														4
Stock options exercised										43,750	0
Aggregate intrinsic value | $										$ 500,000
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based incremental compensation expense from plan modification | $									700,000
Recognized share-based incremental compensation expense from plan modification | $									500,000
Share-based compensation expense | $									$ 1,890,000	$ 2,716,000	$ 2,504,000
Fiscal 2015 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of individual vesting conditions | item									6
Number of performance measures | item									2
Shares authorized to be issued			112,464						112,464						112,464
Life of awards									6 years
Fiscal 2014 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of individual vesting conditions | item				6
Number of performance measures | item				2
Shares authorized to be issued				89,418
Fiscal 2013 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of individual vesting conditions | item						6
Number of performance measures | item						2
Shares authorized to be issued						68,085
Fiscal 2012 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of individual vesting conditions | item												6
Number of performance measures | item												2
Shares authorized to be issued												106,101
Fiscal 2010 Long-Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested							12,524	18,003			171,414
Average share price | $ / shares													$ 5.28	$ 5.28
Contractual life													4 years
Common Stock Price Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period which common stock price must average over specified levels									5 days
Percent of performance award to be granted											0.25%	0.25%	0.50%
Number of employees with additional supplemental award | employee										3
Common Stock Price Performance Award [Member] | 3 Years Or Less [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period to achieve specified levels of common stock price									3 years
Percent of shares which will vest									100.00%
Common Stock Price Performance Award [Member] | 3 To 5 Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares which will vest									50.00%
Common Stock Price Performance Award [Member] | 3 To 5 Years [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period to achieve specified levels of common stock price									3 years
Common Stock Price Performance Award [Member] | 3 To 5 Years [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period to achieve specified levels of common stock price									5 years
Common Stock Price Performance Award [Member] | After 5 Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of the specific price target were met									5 years
Target number of shares expected to vest			0						0						0
Management Stock Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transfer of common stock shares as payment on the loans					3,300,000
Share-based compensation expense | $					$ 500,000						$ 498,000
Unvested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $			$ 200,000						$ 200,000						$ 200,000
Whole-share grant per eligible director | $									$ 75,000
Vesting period of awards									1 year
Shares issued under terms of the award									24,210	14,616	30,672
Fair value of shares awarded | $									$ 500,000	$ 300,000	$ 400,000
Cost of common stock issued from treasury | $									$ 300,000	200,000	400,000
Weighted-average vesting period for recognition									3 months
Total recognized tax benefit from unvested stock awards | $									$ 100,000	100,000	100,000
Intrinsic value of unvested stock awards | $										400,000
Share-based compensation expense | $									$ 400,000	$ 334,000	$ 383,000
Client Partner And Consultant Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional individual vesting conditions | item			0
Granted as fully vested shares											2,000
Value of shares granted and fully vested | $			$ 10,000								$ 15,000
Number of individuals who qualified for award | employee									5	12	6
Threshold of cumulative sales over the career in order to receive common stock | $													$ 20,000,000
Threshold of consulting days performed over the career in order to receive common stock													1500 days
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized additional shares of common stock for issuance	1,000,000
Shares available for granting			964,000						964,000						964,000
Shares remaining in employee stock purchase plan			490,000						490,000						490,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price of common stock as a percent of the average fair market value									85.00%
Shares issued to employee stock purchase plan participants									42,687	36,761	45,845
Cost basis of shares issued to employee stock purchase plan participants | $									$ 600,000	$ 500,000	$ 600,000
Proceeds from ESPP participants | $									700,000	600,000	500,000
Share-based compensation expense | $									$ 121,000	$ 113,000	$ 92,000
Vesting Date 1 [Member] | Fiscal 2010 Long-Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date													Aug. 31, 2012
Vesting date													Aug. 31, 2012
Vesting Date 2 [Member] | Fiscal 2010 Long-Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date													Mar. 02, 2013
Vesting date													Mar. 02, 2013
Vesting Date 3 [Member] | Fiscal 2010 Long-Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date													Aug. 31, 2013
Vesting date													Aug. 31, 2013
Tranche One [Member] | Fiscal 2014 Grant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares		$ 18.05
Number of shares		9,557
Tranche One [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price | $ / shares													$ 9.00	9.00
Tranche Two [Member] | Fiscal 2014 Grant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting price per share | $ / shares		$ 22.00
Number of shares		3,920
Tranche Two [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price | $ / shares													10.00	10.00
Tranche Three [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price | $ / shares													12.00	12.00
Tranche Four [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price | $ / shares													$ 14.00	$ 14.00