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Condensed Consolidated Statements Of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
Condensed Consolidated Statements Of Comprehensive Income [Abstract]        
Net earnings $ 10,952 $ 9,644 $ 16,837 $ 12,459
Other comprehensive income (loss):        
Defined benefit pension plan adjustment, net of tax 38 33 113 71
Unrealized loss on cash flow hedges, net of tax   76    
Foreign currency translation adjustment, net of hedging activities and tax (476) 1,804 37 (269)
Total other comprehensive (loss) income, net of tax (benefit) expense of ($722), ($138), ($69), and $253, respectively (438) 1,913 150 (198)
Total comprehensive income $ 10,514 $ 11,557 $ 16,987 $ 12,261