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Income Taxes (Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Tax provision at U.S. statutory rate 21.00% 21.00% 21.00%
State income taxes 0.70% 2.70% 2.30%
Uncertain tax positions (3.90%) 0.40% 2.60%
Valuation allowance 0.50% 1.20% (47.10%)
Tax exempt interest (4.50%) (3.00%) (1.40%)
Foreign tax rate differential (0.90%) 0.70% 2.90%
Impact of foreign earnings, net 5.30% 1.60% (1.70%)
Tax incentives (7.40%) (9.60%) (6.20%)
Intercompany sale of assets 0.00% 0.00% 35.50%
Other – net 2.20% 1.70% (0.30%)
Rate change (1.30%) (18.10%) 0.00%
Goodwill impairment 2.90% 7.80% 0.00%
Federal R&D tax credit (1.30%) (1.20%) (0.80%)
Stock compensation (2.40%) (1.50%) (0.70%)
Effective income tax rate 10.90% 3.70% 6.10%