Share-Based Compensation Plans (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended	24 Months Ended	12 Months Ended											12 Months Ended						12 Months Ended			6 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended				24 Months Ended	12 Months Ended						1 Months Ended		1 Months Ended
	Mar. 02, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012	Apr. 30, 2014 Fiscal 2014 Grant 2 [Member]	Aug. 31, 2012 Stock Options [Member]	Aug. 31, 2011 Stock Options [Member] item	Aug. 31, 2014 Performance Awards [Member]	Aug. 31, 2013 Performance Awards [Member]	Aug. 31, 2012 Performance Awards [Member]	Aug. 31, 2011 Performance Awards [Member]	Aug. 31, 2014 Performance Awards [Member] Fiscal 2011 Grant [Member]	Aug. 31, 2014 Performance Awards [Member] Fiscal 2012 Grant [Member]	Aug. 31, 2014 Performance Awards [Member] Fiscal 2013 Grant [Member]	Aug. 31, 2014 Performance Awards [Member] Fiscal 2014 Grant 1 [Member]	Aug. 31, 2014 Performance Awards [Member] Fiscal 2014 Grant 2 [Member]	Aug. 31, 2014 Performance Awards [Member] Minimum [Member] Fiscal 2014 Grant 2 [Member]	Aug. 31, 2014 Performance Awards [Member] Maximum [Member] Fiscal 2014 Grant 2 [Member]	Aug. 31, 2014 Performance Awards [Member] 3 Years Or Less [Member]	Aug. 31, 2014 Performance Awards [Member] 3 To 5 Years [Member]	Aug. 31, 2014 Performance Awards [Member] 3 To 5 Years [Member] Minimum [Member]	Aug. 31, 2014 Performance Awards [Member] 3 To 5 Years [Member] Maximum [Member]	Aug. 31, 2014 Fiscal 2014 Executive Award [Member] item	Nov. 30, 2013 Fiscal 2014 Executive Award [Member]	Aug. 31, 2014 Fiscal 2013 Executive Award [Member] item	Aug. 31, 2014 Fiscal 2012 Executive Award [Member] item	Aug. 31, 2012 Fiscal 2012 Executive Award [Member]	Aug. 31, 2013 Fiscal 2010 Long-Term Incentive Plan Award [Member]	Mar. 02, 2013 Fiscal 2010 Long-Term Incentive Plan Award [Member]	Aug. 31, 2012 Fiscal 2010 Long-Term Incentive Plan Award [Member]	Aug. 31, 2011 Fiscal 2010 Long-Term Incentive Plan Award [Member]	Mar. 02, 2013 Management Stock Loans [Member]	Aug. 31, 2013 Management Stock Loans [Member]	Aug. 31, 2014 Unvested Share Awards [Member]	Aug. 31, 2013 Unvested Share Awards [Member]	Aug. 31, 2012 Unvested Share Awards [Member]	Aug. 31, 2013 Unvested Share Awards [Member]	Aug. 31, 2014 Client Partner And Consultant Award [Member] employee	Aug. 31, 2013 Client Partner And Consultant Award [Member] employee	Aug. 31, 2012 Client Partner And Consultant Award [Member] employee	Aug. 31, 2011 Vesting Date 1 [Member] Fiscal 2010 Long-Term Incentive Plan Award [Member]	Aug. 31, 2011 Vesting Date 2 [Member] Fiscal 2010 Long-Term Incentive Plan Award [Member]	Aug. 31, 2011 Vesting Date 3 [Member] Fiscal 2010 Long-Term Incentive Plan Award [Member]	Apr. 30, 2014 Tranche One [Member] Fiscal 2014 Grant 2 [Member]	Aug. 31, 2011 Tranche One [Member] Stock Options [Member]	Apr. 30, 2014 Tranche Two [Member] Fiscal 2014 Grant 2 [Member]	Aug. 31, 2011 Tranche Two [Member] Stock Options [Member]	Aug. 31, 2011 Tranche Three [Member] Stock Options [Member]	Aug. 31, 2011 Tranche Four [Member] Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for granting		409,000
Shares remaining in employee stock purchase plan		532,000
Common stock issued from treasury stock for warrant exercise		698,000
Shares withheld for tax, value		$ 4,400,000
Shares withheld for tax		222,000
Period which common stock price must average over specified levels								5 days
Period to achieve specified levels of common stock price																			3 years		3 years	5 years
Percent of shares which will vest																			100.00%	50.00%
Percent of performance award to be granted								25.00%	25.00%	25.00%	50.00%
Capitalized share-based compensation expense		0	0	0
Unrecognized compensation cost																																		100,000
Number of individual vesting conditions																							6		6	6
Number of performance measures																							2		2	2
Number of tranches							4
Shares authorized to be issued																								89,418	68,085		106,101
Life of awards								5 years															6 years
Number of shares		14,616										294,158	177,616	120,101	8,352	13,477																												9,557		3,920
Vesting price per share												$ 17.00	$ 18.05	$ 22.00	$ 22.00		$ 18.05	$ 22.00																										$ 18.05		$ 22.00
Average share price												$ 11.34	$ 9.55	$ 16.03	$ 19.68	$ 20.01															$ 5.28
Share-based compensation expense		3,534,000	3,589,000	3,835,000	200,000	168,000		2,716,000	2,504,000	3,188,000																						500,000	498,000	334,000	383,000	340,000
Shares vested		30,672																										12,524	18,003	171,414
Vesting date																																									Aug. 31, 2012	Mar. 02, 2013	Aug. 31, 2013
Contractual life																															4 years
Whole-share grant per eligible director																																		50,000
Vesting period of awards																																		1 year
Shares issued under terms of the award																																		14,616	30,672	37,975
Fair value of shares awarded																																		300,000			400,000
Cost of common stock issued from treasury																																		200,000	400,000	500,000
Weighted-average vesting period for recognition																																		3 months
Total recognized tax benefit from unvested stock awards																																		100,000
Intrinsic value of unvested stock awards																																		300,000
Granted as fully vested shares																																							2,000
Value of shares granted and fully vested																																							15,000
Exercise price		$ 11.41	$ 11.25																																										$ 9.00		$ 10.00	$ 12.00	$ 14.00
Number of individuals who qualified for award																																						12	6	3
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
Price of common stock as a percent of the average fair market value		85.00%
Shares issued to employee stock purchase plan participants		36,761	45,845	55,423
Cost basis of shares issued to employee stock purchase plan participants		500,000	600,000	800,000
Proceeds from ESPP participants		$ 600,000	$ 500,000	$ 400,000
Transfer of common stock shares as payment on the loans	3,300,000																															3,300,000