SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 9,100
Balance at End of Year	12,900	$ 9,100
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	9,055	9,348	$ 10,255
Additions Charged to Income	3,798	1,680	2,521
Accounts Receivable Write-offs	(1,336)	(1,739)	(2,601)
Translation and Other	1,358	(234)	(827)
Balance at End of Year	$ 12,875	$ 9,055	$ 9,348