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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Ownership interest | 16.86% | 49.30%
Gross deferred tax assets, valuation allowance | $ 10,546 | $ 11,361
Internal Revenue Code [Member] |  |
Gross deferred tax assets, valuation allowance | $ 2,400 | $ 29,800

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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