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Acquisition (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 13 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2019 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 months |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | $ 13.1 |  |  |  |  |  |  |
Repayment of Ocean Downs debt |  |  |  |  | $ 54.7 | $ 0.0 |  |
Business Combination, Contingent Consideration, Asset, Current | 2.1 |  |  |  |  |  |  |
Business Acquisition, Pro Forma Revenue |  | $ 240.2 | $ 218.7 |  | 845.7 | 754.8 |  |
Business Acquisition, Pro Forma Net Income (Loss) |  | 15.5 | 18.2 |  | 302.4 | 104.1 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 57.4 |  |  |  |  |  |  |
Goodwill, Acquired During Period |  |  |  |  | 20.2 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 95.4 |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Current | (5.2) |  |  |  |  |  |  | $ (34.2)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt | (54.7) |  |  |  |  |  |  |
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) | $ 115.2 |  |  |  |  |  |  |
Racing |  | 37.6 | 38.8 |  | 243.8 | 228.0 |  |
Gain on Ocean Downs/Saratoga transaction |  | 54.9 | $ 0.0 |  | $ 54.9 | $ 0.0 |  |
Scenario, Forecast [Member] | Presque Isle Downs & Casino And Lady Luck Casino [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  | $ 229.5 |
Scenario, Forecast [Member] | Presque Isle Downs & Casino [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 178.9 |  |  |  |
Ocean Downs LLC and Racing Services LLC [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 100.00% |  |  |  |  |  |  |
Equity Method Investments | $ 80.5 |  |  |  |  |  |  |
Racing |  | $ 8.1 |  |  |  |  |  |
Saratoga Casino Holdings, LLC [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Equity Method Investments | 47.8 |  |  |  |  |  |  |
Game Rights [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 87.0 |  |  |  |  |  |  |
Trade Names [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 8.3 |  |  |  |  |  |  |
Other Intangible Assets [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 0.1 |  |  |  |  |  |  |

X
- Definition Gain on tax-efficient partial liquidation agreement for the remaining 50% ownership of the Casino at Ocean Downs and Ocean Downs Racetrack owned by Saratoga Casino Holdings LLC in exchange for the Company's 25% equity interest in SCH, which is the parent company of Saratoga Casino Hotel in Saratoga Springs, New York and Saratoga Casino Black Hawk in Black Hawk, Colorado + References No definition available. + Details
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- Definition Revenues generated by commissions on wagering at pari-mutuel facilities and other pari-mutuel revenues including admissions, sponsorships, food and beverage and other ancillary revenues. + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of long-term debt due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=108330185&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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