Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Income Tax Contingency [Line Items]
U.S. statutory federal income tax rate	$ 3,526,000	$ 2,785,000	$ 9,546,000	$ 8,237,000
U.S. statutory federal income tax rate percentage	35.00%	35.00%	35.00%	35.00%
Impact of foreign taxes at less than U.S. statutory federal income tax rate	(3,878,000)	(1,355,000)	(7,674,000)	(4,603,000)
Impact of foreign taxes at less than U.S. statutory federal income tax rate percentage	(38.40%)	(17.00%)	(28.10%)	(19.50%)
U.S. and foreign losses with no tax benefit	2,815,000	1,161,000	4,600,000	1,941,000
U.S. and foreign losses with no tax benefit percentage	27.90%	14.60%	16.90%	8.20%
U.S. restructuring and other U.S. charges with no benefit	868,000	231,000	1,342,000	554,000
U.S. restructuring and other U.S. charges with no benefit percentage	8.60%	2.90%	4.90%	2.40%
Valuation allowance changes	0	(7,049,000)	0	(7,049,000)
Valuation allowance changes percentage	0.00%	(88.60%)	0.00%	(30.00%)
Establishment (resolution) of uncertain tax positions	(70,000)	(422,000)	(14,000)	(253,000)
Establishment (resolution) of uncertain tax positions percentage	(0.70%)	(5.30%)	(0.10%)	(1.10%)
Other	166,000	299,000	195,000	260,000
Other percentage	1.60%	3.80%	0.70%	1.10%
Total income tax expense (benefit)	3,427,000	(4,350,000)	7,995,000	(913,000)
Total income tax expense (benefit) percentage	34.00%	(54.60%)	29.30%	(3.90%)
Total unrecognized tax benefits that would impact effective tax rate	3,800,000		3,800,000
Accrued interest and penalties on unrecognized tax benefits	1,000,000		1,000,000
Unrecognized tax benefits	5,500,000		5,500,000
Mexico Tax Law Change [Member]
Income Tax Contingency [Line Items]
Impact of foreign taxes at less than U.S. statutory federal income tax rate	$ 800,000		$ 800,000