Annual report pursuant to Section 13 and 15(d)

Income taxes - Schedule of Components of Income From Continuing Operations before Income Taxes (Details)

v3.5.0.2
Income taxes - Schedule of Components of Income From Continuing Operations before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Income before income taxes:      
United States $ 238,871 $ 232,359 $ 180,820
Foreign 47,097 27,460 46,549
Income before income taxes $ 285,968 $ 259,819 $ 227,369