Reconciliation of Statutory U.S. Federal Tax Rate to Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
State	2.10%	2.00%	1.30%
Federal domestic production deduction	(1.80%)	(1.80%)	(0.90%)
Tax on foreign earnings	(2.70%)	(1.60%)	(3.80%)
Other, net	(1.20%)	(0.90%)	(0.70%)
Effective income tax rate	31.40%	32.70%	30.90%