Annual report pursuant to Section 13 and 15(d)

Business segments - Revenue from External Customers by Geographic Areas (Details)

v3.20.2
Business segments - Revenue from External Customers by Geographic Areas (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Revenues and total long-lived assets                      
Revenue $ 923,836 $ 901,337 $ 818,135 $ 818,229 $ 754,966 $ 730,710 $ 736,520 $ 664,619 $ 3,461,537 $ 2,886,815 $ 2,392,236
United States                      
Revenues and total long-lived assets                      
Revenue                 2,962,610 2,287,685 1,692,823
United Kingdom                      
Revenues and total long-lived assets                      
Revenue                 246,335 293,695 347,026
Australia                      
Revenues and total long-lived assets                      
Revenue                 147,156 198,795 247,850
Rest of World                      
Revenues and total long-lived assets                      
Revenue                 $ 105,436 $ 106,640 $ 104,537