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Acquisitions - TUYO (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 01, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Mar. 31, 2015
Business Acquisition [Line Items]          
Payments to acquire remaining equity interest in subsidiary   $ 0 $ 32,411 $ 29,775  
TUYO          
Business Acquisition [Line Items]          
Ownership percentage by noncontrolling owners         41.00%
Payments to acquire remaining equity interest in subsidiary $ 2,800        
Note payable issued to acquire remaining equity interest in subsidiary $ 300        
Ownership interest in subsidiaries         59.00%