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Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Balance, beginning of period	$ 840,947	$ 300,616
Additions		540,331
Adjustments	777
Balance, end of period	841,724	840,947
Racing
Goodwill [Roll Forward]
Balance, beginning of period	51,659	51,659
Additions		0
Adjustments	0
Balance, end of period	51,659	51,659
Casinos
Goodwill [Roll Forward]
Balance, beginning of period	117,659	117,659
Additions		0
Adjustments	0
Balance, end of period	117,659	117,659
TwinSpires
Goodwill [Roll Forward]
Balance, beginning of period	127,364	127,364
Additions		0
Adjustments	802
Balance, end of period	128,166	127,364
Big Fish Games
Goodwill [Roll Forward]
Balance, beginning of period	540,331	0
Additions		540,331
Adjustments	(25)
Balance, end of period	540,306	540,331
Other Investments
Goodwill [Roll Forward]
Balance, beginning of period	3,934	3,934
Additions		0
Adjustments	0
Balance, end of period	$ 3,934	$ 3,934

X

- Definition

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
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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X

- Definition

Amount of other (increase) decrease of an asset representing the 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
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Details

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