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Inventories (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
Nov. 30, 2016
Aug. 31, 2016
Nov. 30, 2015
Inventories [Abstract]      
Raw materials and supplies $ 27,898 $ 26,599 $ 26,611
Work in process 8,001 5,742 8,623
Finished goods and purchased parts 49,917 47,805 48,569
Total inventory value before LIFO adjustment 85,816 80,146 83,803
Less adjustment to LIFO value (5,677) (5,396) (5,557)
Inventories, net $ 80,139 $ 74,750 $ 78,246