Summary of Total Reserves Included in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Receivables Net Current [Abstract]
Reduction to accounts receivable	$ 4,920	$ 6,254
Component of accrued expenses	43,469	45,249
Total reserves	$ 48,389	$ 51,503	$ 34,384	$ 28,510