Fair Value Measurement (Details) (USD $)	Feb. 28, 2014	Aug. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value transfers between levels	$ 0	$ 0
Foreign exchange forward contracts, assets	801,000	151,000
Foreign exchange forward contracts, liabilities	929,000	1,224,000
Long-term fixed-rate debt	65,797,000	63,460,000
Contract value of foreign exchange forward contracts outstanding	121,900,000	138,000,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange forward contracts, assets	0	0
Foreign exchange forward contracts, liabilities	0	0
Long-term fixed-rate debt	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange forward contracts, assets	801,000	151,000
Foreign exchange forward contracts, liabilities	929,000	1,224,000
Long-term fixed-rate debt	65,797,000	63,460,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange forward contracts, assets	0	0
Foreign exchange forward contracts, liabilities	0	0
Long-term fixed-rate debt	0	0
Euro Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable carrying value	$ 62,600,000	$ 60,000,000