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Preferred Stock Purchase Rights | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Preferred Stock Purchase Rights | Note 14. Preferred Stock Purchase Rights We authorized five million shares of Preferred Stock and two million shares of Junior Participating Preferred Stock, none of which was outstanding on December 31, 2017.

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- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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