XML 67 R52.htm IDEA: XBRL DOCUMENT v3.5.0.2
Derivative Financial Instruments - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Derivative [Line Items]    
Short-term forward contracts, average maturities at inception 3 months  
Foreign Currency Forward Contracts    
Derivative [Line Items]    
Forward foreign currency contracts fair value $ 0 $ 0