SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS - DEFERRED TAX ASSET VALUATION ALLOWANCE (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 104,520
Balance at End of Year	104,799	$ 104,520
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	104,520	103,475	$ 99,141
Additions Charged to Income	4,657	2,046	5,681
Accounts Receivable Write-offs	(5,745)	(725)	(190)
Translation and Other	1,367	(276)	(1,157)
Balance at End of Year	$ 104,799	$ 104,520	$ 103,475