Income Taxes (Details) (USD $)	3 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Deferred Tax Liability Not Recognized [Line Items]
Statutory U.S. tax rate	$ 5,454,000	$ 5,815,000
Statutory U.S. tax rate percentage	35.00%	35.00%
Impact of foreign taxes at less than U.S. statutory tax rate	(3,386,000)	(3,317,000)
Impact of foreign taxes at less than U.S. statutory tax rate percentage	(21.70%)	(20.00%)
U.S. and foreign losses with no tax benefit	778,000	659,000
U.S. and foreign losses with no tax benefit percentage	5.00%	4.00%
U.S. restructuring and other U.S. unusual charges with no benefit	323,000	110,000
U.S. restructuring and other U.S. unusual charges with no benefit percentage	2.10%	0.70%
Establishment (resolution) of uncertain tax positions	169,000	31,000
Establishment (resolution) of uncertain tax positions percentage	1.10%	0.20%
Other	99,000	100,000
Other percentage	0.60%	0.60%
Total income tax expense (benefit)	3,437,000	2,651,000
Total income tax expense (benefit) percentage	22.10%	16.00%
Total unrecognized tax benefits that would impact effective tax rate	5,300,000
Accrued interest and penalties on unrecognized tax benefits	1,200,000
Unrecognized tax benefits	6,900,000
Italy Valuation Allowance [Member]
Deferred Tax Liability Not Recognized [Line Items]
Valuation allowance	$ 0	$ (747,000)
Valuation allowance percentage	0.00%	(4.50%)