Quarterly report pursuant to Section 13 or 15(d)

Settlement Agreement - Additional Information (Detail)

v3.10.0.1
Settlement Agreement - Additional Information (Detail)
$ in Thousands
9 Months Ended
Jun. 30, 2018
USD ($)
Apr. 19, 2018
USD ($)
Installments
Component Of Other Income And Expense [Line Items]    
Other current receivables $ 3,900  
Other non current receivables 10,900  
Subsidiaries [Member] | Settlement Agreement [Member]    
Component Of Other Income And Expense [Line Items]    
Settlement agreements, receivable   $ 15,700
Settlement agreements, number of equal installments | Installments   4
Gain related to litigation settlement before tax $ 14,803