Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of August 31, 2013	$ (9,361)
Other comprehensive income (loss) before reclassifications	(4,149)
Income tax benefit (expense)	(7)
Other comprehensive income (loss) before reclassifications, net of tax	(4,156)
Amounts reclassified from accumulated other comprehensive loss	1,332
Income tax (benefit) expense	(456)
Amounts reclassified from accumulated other comprehensive loss, net of tax	876
Total other comprehensive loss, net of tax	(3,280)	(5,742)	(4,479)
Balance as of August 31, 2014	(12,641)	(9,361)
Accumulated Defined Benefit Plans Adjustment
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of August 31, 2013	(2,817)
Other comprehensive income (loss) before reclassifications	(234)
Income tax benefit (expense)	74
Other comprehensive income (loss) before reclassifications, net of tax	(160)
Amounts reclassified from accumulated other comprehensive loss	1,483
Income tax (benefit) expense	(542)
Amounts reclassified from accumulated other comprehensive loss, net of tax	941
Total other comprehensive loss, net of tax	781
Balance as of August 31, 2014	(2,036)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of August 31, 2013	(121)
Other comprehensive income (loss) before reclassifications	325
Income tax benefit (expense)	(81)
Other comprehensive income (loss) before reclassifications, net of tax	244
Amounts reclassified from accumulated other comprehensive loss	(151)
Income tax (benefit) expense	86
Amounts reclassified from accumulated other comprehensive loss, net of tax	(65)
Total other comprehensive loss, net of tax	179
Balance as of August 31, 2014	58
Accumulated Translation Adjustment
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of August 31, 2013	(6,423)
Other comprehensive income (loss) before reclassifications	(4,240)
Income tax benefit (expense)	0
Other comprehensive income (loss) before reclassifications, net of tax	(4,240)
Amounts reclassified from accumulated other comprehensive loss	0
Income tax (benefit) expense	0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0
Total other comprehensive loss, net of tax	(4,240)
Balance as of August 31, 2014	$ (10,663)