Fair Value Measurements (Details) $ in Thousands			3 Months Ended			12 Months Ended
	Nov. 01, 2013 USD ($)	Oct. 01, 2013 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($) item	Jun. 30, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) item	Dec. 31, 2012 USD ($)
Assets measured as fair value on a non-recurring basis
Goodwill				$ 951,953		$ 874,184	$ 951,953	$ 1,380,689
Total Reduction in Fair Value Recorded during the year
Goodwill impairment losses		$ (249,300)				(80,821)	(348,887)
Long-lived assets impairment losses			$ (4,600)	$ (2,200)
Total						(159,884)	(798,305)
Intangible asset amortization expense						11,400	$ 16,100	$ 800
Impairment of intangible asset		$ 311,000				74,500
Number of racetracks relocated | item				2			2
Impairment charges on relocation of racetracks				$ 2,200			$ 2,200
Estimated salvage value			$ 300
Plainridge Racecourse
Assets measured as fair value on a non-recurring basis
Goodwill						3,000
Total Reduction in Fair Value Recorded during the year
Change in fair value of contingent purchase price consideration						(700)
Plainridge Racecourse | General and administrative expenses
Total Reduction in Fair Value Recorded during the year
Change in fair value of contingent purchase price consideration						$ (700)
Hollywood Gaming at Dayton Raceway And Mahoning Valley Race Course
Total Reduction in Fair Value Recorded during the year
Discount Rate						5.00%
Number of racetracks relocated | item				2
Argosy Casino Sioux City
Total Reduction in Fair Value Recorded during the year
Goodwill impairment losses							(68,700)
Total					$ (71,800)
Impairment of intangible asset							3,100
Hollywood Casino Aurora
Assets measured as fair value on a non-recurring basis
Goodwill						$ 207,207
Spinoff
Total Reduction in Fair Value Recorded during the year
Goodwill impairment losses	$ (30,900)						(249,300)
Intangible assets impairment losses	(133,100)
Impairment charges of goodwill and other intangible assets				$ 724,200
Impairment of intangible asset	$ 133,100
Spinoff | Other Intangible Assets
Total Reduction in Fair Value Recorded during the year
Impairment of intangible asset							311,000
Level 1
Financial assets:
Cash and Cash Equivalents, Fair Value Disclosure				292,995		208,673	292,995
Level 3
Financial assets:
Debt Instrument, Fair Value Disclosure						19,189
Revolving credit facility
Total Reduction in Fair Value Recorded during the year
Term loan amount outstanding				0		85,000	0
Senior Secured Credit Facility
Total Reduction in Fair Value Recorded during the year
Term loan amount outstanding						807,500
Senior Secured Credit Facility | Level 1
Financial assets:
Debt Instrument, Fair Value Disclosure				748,150		714,556	748,150
Senior Secured Credit Facility | Level 2
Financial assets:
Debt Instrument, Fair Value Disclosure						85,000
Senior Unsecured Notes | Level 1
Financial assets:
Debt Instrument, Fair Value Disclosure				297,000		276,000	297,000
Other long-term obligations | Level 2
Financial assets:
Debt Instrument, Fair Value Disclosure						135,000
Nonrecurring
Total Reduction in Fair Value Recorded during the year
Goodwill impairment losses						(80,821)	(348,887)
Intangible assets impairment losses						(74,503)	(447,218)
Long-lived assets impairment losses						(4,560)	(2,200)
Total						(159,884)	(798,305)
Nonrecurring | Level 2
Assets measured as fair value on a non-recurring basis
Long-lived assets				6,452			6,452
Nonrecurring | Level 3
Assets measured as fair value on a non-recurring basis
Goodwill				205,547		9,863	205,547
Intangible assets				159,845		66,703	159,845
Long-lived assets						300
Carrying Amount
Financial assets:
Cash and Cash Equivalents, Fair Value Disclosure				292,995		208,673	292,995
Debt Instrument, Fair Value Disclosure						19,189
Carrying Amount | Senior Secured Credit Facility
Financial assets:
Debt Instrument, Fair Value Disclosure				723,109		785,683	723,109
Carrying Amount | Senior Unsecured Notes
Financial assets:
Debt Instrument, Fair Value Disclosure				294,933		295,610	294,933
Carrying Amount | Other long-term obligations
Financial assets:
Debt Instrument, Fair Value Disclosure						135,000
Fair Value
Financial assets:
Cash and Cash Equivalents, Fair Value Disclosure				292,995		208,673	292,995
Debt Instrument, Fair Value Disclosure						19,189
Fair Value | Senior Secured Credit Facility
Financial assets:
Debt Instrument, Fair Value Disclosure				748,150		799,556	748,150
Fair Value | Senior Unsecured Notes
Financial assets:
Debt Instrument, Fair Value Disclosure				297,000		276,000	297,000
Fair Value | Other long-term obligations
Financial assets:
Debt Instrument, Fair Value Disclosure						135,000
Fair Value | Nonrecurring
Assets measured as fair value on a non-recurring basis
Goodwill				205,547		9,863	205,547
Intangible assets				159,845		66,703	159,845
Long-lived assets				$ 6,452		$ 300	$ 6,452