Receivables - Schedule of Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance For Doubtful Accounts Receivable Rollforward
Allowance for doubtful accounts receivables, Beginning balance	$ 33,535	$ 34,956	$ 40,164	$ 23,746
Bad debt expense, net of recoveries	(546)	1,488	(6,097)	18,106
Charge-offs, foreign currency translation and other adjustments	(1,701)	(1,920)	(2,779)	(7,328)
Allowance for doubtful accounts receivables, Ending balance	$ 31,288	$ 34,524	$ 31,288	$ 34,524