Income Taxes (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Income taxes [Line Items] | ||||
| Effective Income Tax Rate | 13.40% | 25.50% | 19.30% | 23.70% |
| Federal Statutory Income Tax Rate, Percent | 35.00% | 35.00% | 35.00% | 35.00% |
| Valuation Allowances and Reserves, Deductions | $ 16,300 | |||