XML 62 R51.htm IDEA: XBRL DOCUMENT v3.21.2
Property and Equipment - Component of Property and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Sep. 30, 2020
Property Plant And Equipment [Abstract]    
Property and equipment $ 235,603 $ 220,220
Less: accumulated depreciation 136,337 126,725
Property and equipment, net $ 99,266 $ 93,495