Goodwill And Indefinite-Lived Intangible Assets Impairment Test - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	$ 231,775	$ 238,865
Finite-Lived Intangible Assets, Accumulated Amortization	(68,511)	(47,236)
Finite-Lived Intangible Assets, Net	163,264	191,629
Intangible Assets, Net (Excluding Goodwill)	521,607	549,972
Indefinite-Lived Intangible Assets (Excluding Goodwill)	358,343	358,343
Intangible Assets Excluding Goodwill, Gross	590,118	597,208
Goodwill	840,947	840,947
Goodwill, Acquired During Period	0
Big Fish Games [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Goodwill	540,331	540,331
Goodwill, Acquired During Period	0
Casino Segment [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Goodwill	117,659	117,659
Goodwill, Acquired During Period	0
TwinSpires [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Goodwill	127,364	127,364
Goodwill, Acquired During Period	0
Racing Segment [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Goodwill	51,659	51,659
Goodwill, Acquired During Period	0
Other Investments Segment [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Goodwill	3,934	$ 3,934
Goodwill, Acquired During Period	0
Customer Relationships [Member] | TwinSpires [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	7,000
Customer Relationships [Member] | Bluff Media Acquisition [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	$ 100