Restructuring Charges and Other Exit-Related Costs Restructuring and Related Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,762	$ 1,873	$ 6,014	$ 5,006
Restructuring charges and other exit-related costs	2,762	1,873	6,580	5,006
Total restructuring charges to date			18,932
Total expected restructuring charges			19,200
Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	76	1,873	631	5,006
Restructuring charges and other exit-related costs	76	1,873	631	5,006
Total restructuring charges to date			13,549
Total expected restructuring charges			13,600
Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,686	0	5,383	0
Restructuring charges and other exit-related costs	2,686	0	5,949	0
Total restructuring charges to date			5,383
Total expected restructuring charges			5,600
Severance costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,161	1,419	4,406	2,474
Total restructuring charges to date			9,590
Total expected restructuring charges			9,700
Severance costs [Member] | Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(31)	1,419	(44)	2,474
Severance costs [Member] | Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,192	0	4,450	0
Contract termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	601	158	1,198	182
Total restructuring charges to date			4,867
Total expected restructuring charges			4,900
Contract termination costs [Member] | Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	107	158	675	182
Contract termination costs [Member] | Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	494	0	523	0
Other restructuring costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	296	410	2,350
Total restructuring charges to date			4,475
Total expected restructuring charges			4,600
Other restructuring costs [Member] | Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	296	0	2,350
Other restructuring costs [Member] | Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	410	0
Asset impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	0	0	566	0
Asset impairments [Member] | Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	0	0	0	0
Asset impairments [Member] | Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	0	0	566	0
Other Exit-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	0	0	566	0
Total restructuring charges to date			566
Other Exit-Related Costs [Member] | Q4'12 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	0	0	0	0
Other Exit-Related Costs [Member] | Q1'14 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other exit-related costs	$ 0	$ 0	$ 566	$ 0