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Summary of Significant Accounting Policies (Gaming Investments) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Regulatory Gaming Assets [Line Items] |  |
Interest Costs Capitalized | $ 0.5 | $ 0.1

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- Definition [Line Items] for Regulatory Gaming Assets [Table] + References No definition available. + Details
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Balance Type: | na
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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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