Quarterly report pursuant to Section 13 or 15(d)

General - Additional Information (Detail)

v3.19.3
General - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]    
Derivative effective dates Aug. 12, 2015  
Cash consideration paid, net of cash acquired $ 100,658  
Sales Returns and Allowances [Member]    
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]    
Sales returns liability $ 79,600 $ 67,300