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Income Taxes - Other (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Reconciliation |  |  |
U.S. Federal statutory tax rate (as a percent) | 35.00% | 35.00% | 35.00%
State and local taxes, net of U.S. Federal tax benefit (as a percent) | 3.50% | 5.70% | (24.40%)
Valuation allowance (as a percent) |  | (0.70%) | (18.20%)
Domestic Production Activities Deduction (as a percent) | (1.70%) | (1.70%) |
Share based compensation (as a percent) | (2.30%) | (0.50%) |
Effect of U.S. Federal tax rate change on deferred balances (as a percent) | (57.90%) |  |
Other, net (as a percent) | (0.60%) | (0.20%) | 0.80%
Effective tax rate (as a percent) | (24.00%) | 37.60% | (6.80%)
Other disclosures |  |  |
Tax benefit related to share-based compensation | $ 2,882 | $ 588 |
Liabilities related to uncertain tax positions | 0 |  |
Income taxes paid: |  |  |
Income taxes paid | $ 22,580 | $ 39,508 | $ 20,992

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