Annual report pursuant to Section 13 and 15(d)

Business combinations and disposal - Schedule of Finite-Lived Intangible Assets (Details)

v3.19.3
Business combinations and disposal - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Components of intangible assets    
Cost $ 260,551 $ 139,359
Accumulated Amortization 81,301 51,324
Intangible Assets, net 179,250 88,035
Customer contracts and relationships    
Components of intangible assets    
Cost 250,455 129,113
Accumulated Amortization 72,430 42,683
Intangible Assets, net 178,025 86,430
Technology-based intangible assets    
Components of intangible assets    
Cost 5,613 5,750
Accumulated Amortization 4,405 4,212
Intangible Assets, net 1,208 1,538
Trademarks and trade names    
Components of intangible assets    
Cost 4,483 4,496
Accumulated Amortization 4,466 4,429
Intangible Assets, net $ 17 $ 67
Weighted Average    
Components of intangible assets    
Weighted average remaining life of assets not fully amortized 9 years  
Weighted Average | Customer contracts and relationships    
Components of intangible assets    
Weighted average remaining life of assets not fully amortized 9 years 1 month 6 days  
Weighted Average | Technology-based intangible assets    
Components of intangible assets    
Weighted average remaining life of assets not fully amortized 4 years 1 month 6 days  
Weighted Average | Trademarks and trade names    
Components of intangible assets    
Weighted average remaining life of assets not fully amortized 3 months 18 days