Long-term Debt (Details 2) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Apr. 11, 2014 item	Sep. 30, 2014 facility item	Jan. 31, 2015
Future minimum repayments of long-term debt
Within one year	$ 40,890,000
1-3 years	123,828,000
3-5 years	500,989,000
Over 5 years	615,406,000
Total minimum payments	1,281,113,000
Long-term Debt
Interest expense	12,163,000	11,295,000
Decreae in other assets	23,700,000		25,200,000
Decrease in long-term debt	23,700,000		25,200,000
Senior Secured Credit Facility
Long-term Debt
Gross outstanding balance	830,600,000
Letters of credit outstanding	22,700,000
Available borrowing capacity	362,300,000
Revolving credit facility
Long-term Debt
Term of debt	5 years
Maximum borrowing capacity	500,000,000
Gross outstanding balance	115,000,000
Term Loan A Facility
Long-term Debt
Term of debt	5 years
Maximum borrowing capacity	500,000,000
Gross outstanding balance	468,700,000
Term Loan B Facility
Long-term Debt
Term of debt	7 years
Maximum borrowing capacity	250,000,000
Gross outstanding balance	246,900,000
Senior Unsecured 5.875% Percent Notes
Long-term Debt
Debt instrument interest rate stated percentage	5.875%
Principal amount	300,000,000
Other long-term obligations
Long-term Debt
Other long term obligations	169,800,000
Other long-term obligations | Plainridge Racecourse
Long-term Debt
Other long term obligations	19,500,000
Period considered to calculate contingent purchase consideration				10 years
Number of days for first payment due after completion of first four full fiscal quarters of operations				60 days
Number of quarters considered to make first payment				4
Number of years payment after first payment				9 years
Accretion on instrument	400,000
Interest expense	400,000
Other long-term obligations | Hollywood Gaming at Dayton Raceway And Mahoning Valley Race Course
Long-term Debt
Other long term obligations	135,000,000
Discount Rate	5.00%
Other long-term obligations | Hollywood Casino Lawrenceburg
Long-term Debt
Other long term obligations	15,300,000
Other long-term obligations | Racetracks in Toledo and Grove City to Dayton and Austintown
Long-term Debt
Number of New Facilities					2
Contractual Obligation Relocation Fee					75,000,000
Discount Rate					5.00%
Relocation fee payable upon opening of the facility					7,500,000
Number of semi-annual payments					18
Semi-annual payment amount beginning one year from the commencement of operation					4,800,000
Effective yield	5.00%
Interest expense	1,700,000
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						15,300,000
Annual payment amount	1,000,000
Effective yield	3.00%
Interest expense	$ 100,000