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Accumulated Other Comprehensive Loss
 6 Months Ended
Mar. 31, 2016
Equity [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are as follows:
 
March 31, 
 2016
 
September 30, 
 2015
Foreign currency translation adjustment, net of tax
$
(5,416
)
 
$
(5,731
)
Retirement plan liability adjustment, net of tax
(5,854
)
 
(6,257
)
Total accumulated other comprehensive loss
$
(11,270
)
 
$
(11,988
)