Goodwill And Indefinite-Lived Intangible Assets Impairment Test - Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Goodwill
Goodwill	$ 840,947us-gaap_Goodwill	$ 840,947us-gaap_Goodwill
Goodwill, Acquired During Period	0us-gaap_GoodwillAcquiredDuringPeriod
Intangible Assets, Net (Excluding Goodwill)
Definite-lived intangible assets, gross carrying amount	238,865	238,865
Definite-lived intangible assets, accumulated amortization	(61,476)	(47,236)
Definite-lived intangible assets, net book value	177,389us-gaap_FiniteLivedIntangibleAssetsNet	191,629us-gaap_FiniteLivedIntangibleAssetsNet
Intangible Assets, Net (Excluding Goodwill)	535,732	549,972
Indefinite-lived intangible assets, gross carrying value	358,343	358,343
Intangible Assets Excluding Goodwill, Gross	597,208	597,208
Big Fish Games [Member]
Goodwill
Goodwill	540,331	540,331
Goodwill, Acquired During Period	0
Casino Segment [Member]
Goodwill
Goodwill	117,659	117,659
Goodwill, Acquired During Period	0
TwinSpires [Member]
Goodwill
Goodwill	127,364	127,364
Goodwill, Acquired During Period	0
Racing Segment [Member]
Goodwill
Goodwill	51,659	51,659
Goodwill, Acquired During Period	0
Other Investments Segment [Member]
Goodwill
Goodwill	3,934	3,934
Goodwill, Acquired During Period	$ 0

Intangible Assets Excluding Goodwill, Gross

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- 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

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- 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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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph ((a)(1),(b))

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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