Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Income Taxes - Effective Tax Rates Differ from Statutory Federal Income Tax (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Statutory Federal Income Tax Rate 21.00% 35.00% 35.00%
Stock Compensation Expense (0.90%) 1.10% 1.10%
Domestic Production Activity Deduction 0.00% (4.70%) (3.30%)
Other 0.40% 0.50% 0.20%
Foreign Tax Benefits 0.50% (5.60%) (1.10%)
State Income Tax, Net of Federal Income Tax Effect 2.80% 4.50% 1.80%
Revised State Filing Tax Benefit, Net of Federal Income Tax Effect, Net of Reserve (6.70%) 0.00% 0.00%
Research and Development Tax Credits (6.20%) (11.50%) (3.70%)
Tax Expense on Deemed Repatriation of Foreign Earnings (0.80%) 5.60% 0.00%
Revaluation of Deferred Taxes for Federal Tax Rate Change (0.10%) (3.50%) 0.00%
Other 0.50% (0.10%) (0.40%)
Effective Tax Rate 10.50% 21.30% 29.60%