Income Taxes - Reconciliation of Income Tax Expense (Benefit) for Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Income tax provision		$ 23,952	$ 85,375	$ 128,483
Net U.S. GILTI inclusion		1,455	0	0
Goodwill impairment		8,432	0	0
Valuation allowance - Other		(158)	(651)	0
State and local income tax, net of federal income tax effect		4,011	7,867	8,693
Domestic manufacturing deduction		0	(2,940)	(9,870)
U.S. tax credits		(4,401)	(2,474)	(3,013)
Tax law or rate change excluding U.S. tax act		0	0	794
U.S. tax reform incl. SAB 118 provisional adjustment - transition tax		5,026	35,378	0
U.S. tax reform incl. SAB 118 provisional adjustment - remeasurement of deferred taxes		(3,576)	20,413	0
Difference in effective tax rates of international operations		(1,124)	(4,667)	(4,900)
Income tax contingencies, net of federal income tax effect		1,263	(551)	(1,900)
Other - net		890	(2,814)	(47)
Provision for income taxes		$ 33,495	$ 147,180	$ 115,799
Statutory tax rate (as a percent)		21.00%	35.00%	35.00%
State Administration of Taxation, China
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (6,671)	$ (2,275)		$ (2,441)
Her Majesty's Revenue and Customs (HMRC)
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 18,915	$ 0		$ 0