Restructuring Charges and Other Exit-Related Costs Restructuring and Related Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,000	$ 6,401	$ 7,906	$ 5,012
Total expected restructuring charges		19,750
Total restructuring charges to date		19,319
Restructuring charges and other exit-related costs		6,967	7,906	5,012
Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		631	7,906	5,012
Total expected restructuring charges		13,600
Total restructuring charges to date		13,549
Restructuring charges and other exit-related costs		631	7,906	5,012
Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		5,770	0	0
Total expected restructuring charges		6,150
Total restructuring charges to date		5,770
Restructuring charges and other exit-related costs		6,336	0	0
Severance costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		4,607	2,443	2,741
Total expected restructuring charges		9,800
Total restructuring charges to date		9,791
Severance costs | Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(44)	2,443	2,741
Severance costs | Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		4,651	0	0
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1,384	3,229	440
Total expected restructuring charges		5,400
Total restructuring charges to date		5,053
Contract termination costs | Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		675	3,229	440
Contract termination costs | Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		709	0	0
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		410	2,234	1,831
Total expected restructuring charges		4,550
Total restructuring charges to date		4,475
Other restructuring costs | Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0	2,234	1,831
Other restructuring costs | Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		410	0	0
Asset impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs		566	0	0
Asset impairments | Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs		0	0	0
Asset impairments | Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs		566	0	0
Total exit-related costs
Restructuring Cost and Reserve [Line Items]
Total restructuring charges to date		566
Restructuring charges and other exit-related costs		566	0	0
Total exit-related costs | Q4’12 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs		0	0	0
Total exit-related costs | Q1’14 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs		$ 566	$ 0	$ 0