Annual report pursuant to Section 13 and 15(d)

Business combinations and disposal Business combinations and disposals - Ascend Management Innovations, LLC (Details)

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Business combinations and disposal Business combinations and disposals - Ascend Management Innovations, LLC (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 29, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Business combinations        
Gain on sale of a business   $ 6,880 $ 0 $ 0
Goodwill   $ 21,453    
Ascend Management Innovations LLC        
Business combinations        
Share capital acquired (as a percent) 100.00%      
Purchase consideration, net of cash acquired $ 44,069      
Intangible assets $ 22,300      
Amortization period of intangible assets 18 years      
Goodwill $ 18,554