Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details)
3 Months Ended
Mar. 31, 2018
Income Tax Contingency [Line Items]  
Statutory rate 21.00%
Noncontrolling interests (16.90%)
Foreign taxes not creditable against U.S. income tax 6.60%
Subpart F income 2.10%
State taxes 3.10%
Other 0.10%
Effective Income Tax Rate Reconciliation, Percent (4.60%)
UNITED STATES  
Income Tax Contingency [Line Items]  
Income not subject to tax (6.60%)
Foreign Tax Authority [Member]  
Income Tax Contingency [Line Items]  
Income not subject to tax (14.00%)