Income Taxes (Details 3) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
|
| Tax at federal rate | 21.00% | 34.00% | 35.00% |
| U.S. income attributable to pass-through entity | 0.00% | (3.00%) | |
| U.S. income subject to valuation allowance | (29.80%) | 0.00% | |
| State and local income taxes | (0.30%) | 0.00% | |
| Foreign income not subject to U.S. federal tax | 7.60% | (31.00%) | |
| Foreign tax | (2.70%) | 7.50% | |
| Effective income tax rate | (4.30%) | 7.50% | |