The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 16, 2014	Jul. 17, 2013
Goodwill [Roll Forward]
Balance, beginning of period	$ 300,616us-gaap_Goodwill	$ 250,414us-gaap_Goodwill
Additions	538,904us-gaap_GoodwillAcquiredDuringPeriod	50,202us-gaap_GoodwillAcquiredDuringPeriod
Balance, end of period	839,520us-gaap_Goodwill	300,616us-gaap_Goodwill
Racing Segment [Member]
Goodwill [Roll Forward]
Balance, beginning of period	51,659	51,659
Additions	0	0
Balance, end of period	51,659	51,659
Casino Segment
Goodwill [Roll Forward]
Balance, beginning of period	117,659	67,457
Additions	0	50,202
Balance, end of period	117,659	117,659
TwinSpires [Member]
Goodwill [Roll Forward]
Balance, beginning of period	127,364	127,364
Additions	0	0
Balance, end of period	127,364	127,364
Big Fish Games [Member]
Goodwill [Roll Forward]
Balance, beginning of period	0	0
Additions	538,904	0
Balance, end of period	538,904	0
Other Investments
Goodwill [Roll Forward]
Balance, beginning of period	3,934	3,934
Additions	0	0
Balance, end of period	3,934	3,934
Big Fish Games [Member]
Goodwill [Line Items]
Goodwill	538,900		538,904
Oxford Acquisition [Member]
Goodwill [Line Items]
Goodwill		$ 50,200		$ 50,202