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Income Taxes - Reconciliation of Statutory Rate (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Statutory rate | 21.00% | 21.00% | 21.00%
State taxes, net of federal benefit | (0.50%) | (0.80%) | 3.00%
Effect of rates different than statutory | (2.10%) | (4.30%) | (2.00%)
Minority interest | 0.20% | 0.20% | (1.00%)
Non-deductible Bad Debt | (2.90%) | 0.00% | 0.00%
Stock based compensation | (6.10%) | (2.50%) | (2.00%)
Foreign Basis Differences | 9.80% | 0.00% | 0.00%
Other permanent differences | (0.90%) | (0.30%) | 0.00%
Research and development credit | 6.50% | 0.50% | 0.00%
Change in valuation allowance | (3.20%) | 6.70% | (17.00%)
Uncertain tax positions | (0.70%) | 0.60% | 1.00%
Other | 1.10% | (1.20%) | 1.00%
Acquisitions and foreign tax residency changes | 0.00% | 0.00% | 3.00%
Investment in JV | 0.00% | (1.70%) | 0.00%
Global Intangible Low-Taxed Income | 3.90% | (3.30%) | 0.00%
Base Erosion Anti-Abuse Tax and Related Elections | 0.90% | (17.00%) | 0.00%
NOL Carryback and Other Refund Claims | 45.40% | 0.00% | 0.00%
Effective tax rate | 72.40% | (2.10%) | 7.00%

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