Income Taxes Significant Differences Between U.S. Federal Statutory Rate and Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax benefit	(0.50%)	(0.10%)	1.40%
Change in valuation allowance	(1.40%)	3.70%	5.70%
Impact of foreign earnings, net	(13.50%)	(19.30%)	(22.00%)
Change in U.S. federal statutory rate	(14.00%)	0.00%	0.00%
Transition tax on deferred foreign earnings	96.10%	0.00%	0.00%
Subpart F income	2.00%	0.20%	7.80%
Deemed repatriation of foreign income	0.00%	0.00%	105.50%
Undistributed earnings of foreign subsidiaries	(2.20%)	0.10%	(114.80%)
Stock-based compensation	(1.90%)	0.00%	0.00%
Nondeductible transaction costs	0.00%	0.00%	2.00%
Depletion	(1.40%)	(1.00%)	(1.80%)
Revaluation of unrecognized tax benefits/reserve requirements	(0.70%)	(0.40%)	(14.40%)
Domestic manufacturing tax deduction	(0.00%)	(0.90%)	(0.50%)
Other items, net	(0.90%)	1.40%	(0.30%)
Effective income tax rate	96.60%	18.70%	3.60%