Long-term Debt (Details 2) $ in Thousands		1 Months Ended	3 Months Ended			6 Months Ended
	Feb. 08, 2016 USD ($)	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2014 USD ($) facility item	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Future minimum repayments of long-term debt
Within one year			$ 44,015			$ 44,015
1-3 years			151,891			151,891
3-5 years			478,478			478,478
Over 5 years			614,781			614,781
Total minimum payments			1,289,165			1,289,165
Long-term Debt
Interest expense			109,798		$ 105,069	$ 218,144	$ 209,583
Lease term						35 years
Long-term debt			1,289,165			$ 1,289,165		$ 1,267,637
Capital Lease Obligations.
Long-term Debt
Lease term						10 years
Capital lease term renewal option						10 years
Capital lease obligation			24,900			$ 24,900		24,900
Senior Secured Credit Facility
Long-term Debt
Gross outstanding balance			813,800			813,800
Letters of credit outstanding			22,900			22,900
Available borrowing capacity			372,100			372,100
Long-term debt			813,750			$ 813,750		807,500
Line of Credit
Long-term Debt
Term of debt						5 years
Maximum borrowing capacity			500,000			$ 500,000
Gross outstanding balance			105,000			$ 105,000
Term Loan A Facility
Long-term Debt
Term of debt						5 years
Maximum borrowing capacity			500,000			$ 500,000
Gross outstanding balance			462,500			$ 462,500
Term Loan B Facility
Long-term Debt
Term of debt						7 years
Maximum borrowing capacity			250,000			$ 250,000
Gross outstanding balance			$ 246,300			$ 246,300
Senior unsecured notes 5.875% due November 2021
Long-term Debt
Debt instrument interest rate stated percentage			5.875%			5.875%
Principal amount			$ 300,000			$ 300,000
Long-term debt			300,000			300,000		300,000
Senior unsecured notes 5.875% due November 2021 | Subsequent Event
Long-term Debt
Additional interest (as a percent)	0.25%
Long-term debt	$ 300,000
Other long term obligations
Long-term Debt
Other long term obligations			150,300			150,300
Long-term debt			150,300			150,300		$ 135,000
Other long term obligations | Hollywood Gaming at Dayton Raceway and Mahoning Valley Race Course
Long-term Debt
Other long term obligations			135,000			$ 135,000
Discount Rate						5.00%
Other long term obligations | Hollywood Casino Lawrenceburg
Long-term Debt
Other long term obligations			$ 15,300			$ 15,300
Other long term obligations | Racetracks in Toledo and Grove City to Dayton and Austintown
Long-term Debt
Number of new facilities | facility				2
Contractual obligation, relocation fee				$ 75,000
Discount Rate				5.00%
Relocation fee payable upon opening of the facility				$ 7,500
Number of semi-annual payments | item				18
Semi-annual payment amount beginning one year from the commencement of operation				$ 4,800
Effective yield			5.00%			5.00%
Interest expense			$ 1,700			$ 3,400
Other long term obligations | City of Lawrenceburg Department of Redevelopment
Long-term Debt
Term of debt						20 years
Purchase price of hotel and event center		$ 15,300
Annual payment amount						$ 1,000
Effective yield			3.00%			3.00%
Interest expense			$ 100			$ 200