Annual report pursuant to Section 13 and 15(d)

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

v3.19.3
Business segments - Revenue from External Customers by Geographic Areas (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Revenues and total long-lived assets                      
Revenue $ 754,966 $ 730,710 $ 736,520 $ 664,619 $ 558,446 $ 597,855 $ 612,787 $ 623,148 $ 2,886,815 $ 2,392,236 $ 2,450,961
United States                      
Revenues and total long-lived assets                      
Revenue                 2,287,685 1,692,823 1,765,661
United Kingdom                      
Revenues and total long-lived assets                      
Revenue                 293,695 347,026 346,342
Australia                      
Revenues and total long-lived assets                      
Revenue                 198,795 247,850 232,434
Rest of World                      
Revenues and total long-lived assets                      
Revenue                 $ 106,640 $ 104,537 $ 106,524