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INCOME TAXES (Details 1)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
US Federal statutory rate 35.00% 35.00% 35.00%
State taxes, net of Federal benefit 2.00% 2.10% 2.10%
Impact of Tax Cuts and Jobs Act 81.90% 0.00% 0.00%
International tax structure impacts 0.00% 23.30% 0.00%
Domestic production activities deduction (8.80%) (14.40%) (5.30%)
Change in valuation allowance 0.00% 1.60% 0.00%
Stock-based compensation - no windfall tax benefits 1.00% 5.70% 1.10%
Stock-based compensation - windfall tax benefit (0.20%) 0.00% (0.10%)
Change in tax rates and other (4.30%) 1.40% (3.50%)
Total income tax provision/(benefit) 106.60% 54.70% 29.30%