Fair Value Measurement (Details) (USD $)	Aug. 31, 2013	Aug. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange forward contracts, assets	$ 151,000	$ 92,000
Foreign exchange forward contracts, liabilities	1,224,000	69,000
Long-term fixed-rate debt	63,460,000	65,210,000
Derivative, Notional Amount	138,000,000	43,000,000
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	151,000	92,000
Foreign exchange forward contracts, liabilities	1,224,000	69,000
Long-term fixed-rate debt	63,460,000	65,210,000
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	$ 60,000,000	$ 60,300,000