Restructuring Charges and Other Exit-Related Costs Reserve Rollforward (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Restructuring Reserve [Roll Forward]
Charges	$ 1,440	$ 1,540	$ 3,253	$ 3,133
Total restructuring charges to date			16,171
Total expected restructuring charges			18,700
Q4'12 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			3,305
Charges	67	1,540	555	3,133
Payments and Other			(2,062)
Restructuring reserve, ending balance	1,798		1,798
Total restructuring charges to date			13,473
Total expected restructuring charges			13,500
Q1'14 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	1,373	0	2,698	0
Payments and Other			(1,716)
Restructuring reserve, ending balance	982		982
Total restructuring charges to date			2,698
Total expected restructuring charges			5,200
Severance costs [Member]
Restructuring Reserve [Roll Forward]
Charges	1,143	116	2,246	1,055
Total restructuring charges to date			7,430
Total expected restructuring charges			9,600
Severance costs [Member] | Q4'12 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			278
Charges	(39)	116	(13)	1,055
Payments and Other			(227)
Restructuring reserve, ending balance	38		38
Severance costs [Member] | Q1'14 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	1,182	0	2,259	0
Payments and Other			(1,300)
Restructuring reserve, ending balance	959		959
Contract termination costs [Member]
Restructuring Reserve [Roll Forward]
Charges	97	19	597	24
Total restructuring charges to date			4,266
Total expected restructuring charges			4,600
Contract termination costs [Member] | Q4'12 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			3,027
Charges	106	19	568	24
Payments and Other			(1,835)
Restructuring reserve, ending balance	1,760		1,760
Contract termination costs [Member] | Q1'14 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	(9)	0	29	0
Payments and Other			(6)
Restructuring reserve, ending balance	23		23
Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Charges	200	1,405	410	2,054
Total restructuring charges to date			4,475
Total expected restructuring charges			4,500
Other restructuring costs [Member] | Q4'12 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	0	1,405	0	2,054
Payments and Other			0
Restructuring reserve, ending balance	0		0
Other restructuring costs [Member] | Q1'14 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	200	0	410	0
Payments and Other			(410)
Restructuring reserve, ending balance	$ 0		$ 0