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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]      
Net income $ 43,746 $ 39,813 $ 35,485
Other comprehensive income (loss):      
Foreign currency translation adjustment 6,146 (2,316) (2,369)
Total comprehensive income $ 49,892 $ 37,497 $ 33,116