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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax [Line Items] |  |  |
Tax Act, increase in tax expense |  | $ 82,000 |
Tax Act, tax benefit | $ 6,700 |  |
Net deferred tax assets | 127,867 | 221,819 |
Deferred tax assets after valuation allowance | 254,624 | 353,215 |
Gross deferred tax liabilities | 126,757 | 131,396 |
Unrecognized tax benefits | 20,184 | 4,271 | $ 4,244
Unrecognized tax benefits that would impact effective tax rate | 17,000 |  |
Interest and income taxes accrued | 1,600 | 400 |
Penalties and interest expense | 1,300 | $ 100 |
Domestic Tax Authority |  |  |
Income Tax [Line Items] |  |  |
Deferred tax assets after valuation allowance | 49,800 |  |
Decrease in unrecognized tax benefits is reasonably possible | 6,700 |  |
State and Local Jurisdiction |  |  |
Income Tax [Line Items] |  |  |
Deferred tax assets after valuation allowance | 7,200 |  |
Decrease in unrecognized tax benefits is reasonably possible | $ 900 |  |

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- Definition Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Existing Income Tax Expense (Benefit) + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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