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Segment Information (Reconciliation of Capital Expenditures) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | $ (190,417) | $ (160,427) | $ (128,305)
Change in Accrued Property Additions | 47 | (69) | 2,865
Cash-Based Capital Expenditures | 190,464 | 160,358 | 131,170
Las Vegas Locals |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | (59,382) | (42,069) | (41,772)
Downtown Las Vegas |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | (21,705) | (28,431) | (13,000)
Midwest and South |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | (37,657) | (73,255) | (60,887)
Reportable Segment [Member] |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | (118,744) | (143,755) | (115,659)
Corporate |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | $ (71,673) | $ (16,672) | $ 12,646

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