SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS - DEFERRED TAX ASSET VALUATION ALLOWANCE (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	$ 119,233
Balance at End of Year	155,008	$ 119,233
Valuation Allowance of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	119,233	143,971	$ 104,799
Additions Charged to Income	30,640	31,564	43,361
Accounts Receivable Write-offs	(59)	(55,797)	(2,871)
Translation and Other	5,194	(505)	(1,318)
Balance at End of Year	$ 155,008	$ 119,233	$ 143,971