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Other (Income) Expense, Net (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Other (Income) Expense, Net        
Equity interest in earnings of the JV (Note 4) $ (2,158) $ 0 $ (2,158) $ 0
Net gain on sales of assets 1 (658) (1,601) (718)
Rent income (83) (135) (184) (260)
Net (gain) loss on investments in deferred compensation program (130) (256) (434) (490)
Other (57) (35) (59) (71)
Other (income) expense, net $ (2,427) $ (1,084) $ (4,436) $ (1,539)