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Basis of Presentation and Recently Issued Accounting Pronouncements - Recently Issued Accounting Pronouncements (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Accounting Policies [Abstract] |
Cumulative effect of a change in accounting for stock-based payments (Note 2) | $ 2.5

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- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 + Details
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