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Segment Information - Information About Reported Segments (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) | [1] | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) Segment | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | Segment |  |  |  |  |  |  |  |  | 6 |  |
Net revenue | $ 272,387 | $ 279,765 | $ 409,239 | $ 250,910 | $ 168,122 | $ 173,483 | $ 303,472 | $ 167,141 | $ 1,212,301 | $ 812,218 | $ 779,028
Net revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Racing: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 248,603 | 261,453 | 274,269
Net revenue |  |  |  |  |  |  |  |  | 14,201 | 14,601 | 12,495
Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 332,299 | 328,294 | 297,176
TwinSpires |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 200,168 | 190,333 | 184,541
Net revenue |  |  |  |  |  |  |  |  | 1,032 | 958 | 853
Big Fish Games: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 413,685 | 13,855 | 0
Other Investments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 16,636 | 17,125 | 21,899
Net revenue |  |  |  |  |  |  |  |  | 3,532 | 4,130 | 4,409
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 910 | 1,158 | 1,143
Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | (18,765) | (19,689) | (17,757)
Casino | Big Fish Games: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 193,428 | 7,627 | 0
Casual free-to-play | Big Fish Games: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 125,321 | 2,098 | 0
Premium | Big Fish Games: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 94,936 | 4,130 | 0
Oxford Casino | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 80,405 | 76,526 | 34,350
Riverwalk Casino | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 49,758 | 50,139 | 53,645
Harlow’s Casino | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 48,978 | 50,199 | 52,440
Calder Casinos | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 77,421 | 77,003 | 78,951
Fair Grounds Slots | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 38,408 | 40,774 | 42,156
VSI | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 36,913 | 33,653 | 35,634
Saratoga | Casinos: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 416 | 0 | 0
Churchill Downs | Racing: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 151,125 | 143,191 | 132,845
Net revenue |  |  |  |  |  |  |  |  | 7,832 | 7,038 | 6,686
Arlington | Racing: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 54,405 | 60,312 | 64,483
Net revenue |  |  |  |  |  |  |  |  | 5,063 | 5,767 | 3,395
Fair Grounds | Racing: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 40,343 | 38,625 | 40,677
Net revenue |  |  |  |  |  |  |  |  | 1,306 | 1,089 | 1,151
Calder | Racing: |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 2,730 | 19,325 | 36,264
Net revenue |  |  |  |  |  |  |  |  | $ 0 | $ 707 | $ 1,263
[1] | Refer to Note 12—Director and Employee Benefit Plans for discussion of an out of period adjustment during the fourth quarter of 2015.

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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