Schedule of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense at federal statutory rate	21.00%	21.00%	35.00%
State taxes, net of federal tax effect	(1.70%)	(1.30%)	2.50%
Foreign earnings taxed at different rates	(6.10%)	(20.50%)	(24.20%)
Book tax difference in amortization of intangible property	(4.60%)	(0.00%)	(0.00%)
Withholding tax	3.10%	5.50%	1.90%
Foreign tax credit	(3.00%)	(5.20%)	(1.10%)
Other international components	0.20%	0.30%	0.00%
Change in valuation allowance	1.60%	2.50%	0.20%
Deferred tax adjustments and rate changes	1.00%	(1.70%)	4.00%
Meals and entertainment	1.30%	2.60%	0.70%
Non-deductible officers compensation	1.40%	2.10%	0.00%
Section 199 deduction	(0.00%)	(0.00%)	(1.40%)
Subpart F income	3.20%	7.00%	1.50%
Research and development tax credit	(9.30%)	(11.80%)	(1.10%)
Stock compensation	1.80%	5.80%	0.60%
GILTI, net of foreign tax credit	0.90%	0.50%	0.00%
FDII	(1.90%)	(4.50%)	(0.00%)
Transition Tax	0.00%	(15.20%)	55.40%
Other permanent differences	1.30%	3.00%	0.50%
Total	10.20%	(9.90%)	74.50%