Annual report pursuant to Section 13 and 15(d)

Income Taxes - Effective Tax Rates Differ from Statutory Federal Income Tax (Detail)

v3.6.0.2
Income Taxes - Effective Tax Rates Differ from Statutory Federal Income Tax (Detail)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Statutory Federal Income Tax Rate 35.00% 35.00% 35.00%
Non-deductible Stock Compensation Expense 1.10% 0.60% 0.60%
Domestic Production Activity Deduction (3.30%) (2.90%) (2.60%)
Other 0.20% 0.20% 0.10%
Foreign Tax Benefits (1.10%) (1.10%) (1.70%)
State Income Tax, Net of Federal Income Tax Effect 1.80% 0.90% 2.60%
Research and Development Tax Credits (3.70%) (2.70%) (4.30%)
Other (0.40%) (1.20%) (0.70%)
Effective Tax Rate 29.60% 28.80% 29.00%