Income Taxes Reconciliation of Total Gross Liability Related to Uncertain Tax Positions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 21,438	$ 25,384	$ 95,715
Divestitures	0	0	(55,881)
Additions for tax positions related to prior years	874	0	548
Reductions for tax positions related to prior years	0	(1,933)	(1,253)
Additions for tax positions related to current year	1,091	1,132	1,271
Lapses in statutes of limitations/settlements	(3,578)	(4,198)	(12,591)
Foreign currency translation adjustment	(83)	1,053	(2,425)
Ending Balance	$ 19,742	$ 21,438	$ 25,384