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Basis of Presentation and Recently Issued Accounting Pronouncements (Details) $ in Thousands | Jan. 01, 2018 USD ($)
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Accounting Standards Update 2016-01 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net unrealized gain on available-for-sale equity securities | $ 275 |
Accounting Standards Update 2017-05 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Adjustment to retained earnings | $ 12,756 | [1]
[1] | See Note 2. Recently Issued Accounting Pronouncements Adopted.

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- Definition Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84241550&loc=SL75117546-209714 + Details
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