Income Taxes - Reconciliation of U. S. Federal Statutory Income Tax Rate to Actual Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision computed at statutory rate	21.00%	21.00%	35.00%
U.S. Tax Reform - one-time transition tax	0	(0.006)	0.418
Remeasurement of deferred taxes	0.20%	0.70%	(56.00%)
Change in valuation allowance	(1.70%)	(4.50%)	96.40%
US impact of Enterprise acquisition and integration	1.00%	1.10%	12.90%
Change in contingent income tax reserves	(3.30%)	3.20%	14.00%
Foreign earnings subject to U.S. taxation	1.80%	2.00%	2.00%
Foreign rate differential	(0.70%)	(2.00%)	(29.10%)
Intra-entity transactions	0.00%	0.00%	(18.80%)
State income tax, net of Federal tax benefit	(0.20%)	0.80%	(5.30%)
Tax credits	(2.30%)	(1.90%)	(5.70%)
Equity compensation deductions	(4.00%)	(2.00%)	(5.60%)
Return to provision and other true ups	(2.00%)	1.10%	(3.20%)
Other	(0.80%)	0.80%	2.30%
Provision for income taxes	9.00%	19.70%	80.70%