Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Carrying Amount
Financial assets:
Cash and cash equivalents	$ 233,118	$ 233,118	$ 208,673
Fair Value
Financial assets:
Cash and cash equivalents	233,118	233,118	208,673
Level 1
Financial assets:
Cash and cash equivalents	233,118	233,118	208,673
Plainridge Racecourse | General and administrative expense
Financial assets:
Change in fair value	300	700
Other liabilities | Carrying Amount
Financial assets:
Long-term debt	19,896	19,896	19,189
Other liabilities | Fair Value
Financial assets:
Long-term debt	19,896	19,896	19,189
Other liabilities | Level 3
Financial assets:
Long-term debt	19,896	19,896	19,189
Senior Secured Credit Facility | Carrying Amount
Financial assets:
Long-term debt	794,619	794,619	785,683
Senior Secured Credit Facility | Fair Value
Financial assets:
Long-term debt	805,901	805,901	799,556
Senior Secured Credit Facility | Level 1
Financial assets:
Long-term debt	700,901	700,901	714,556
Senior Secured Credit Facility | Level 2
Financial assets:
Long-term debt	105,000	105,000	85,000
Senior Unsecured Notes | Carrying Amount
Financial assets:
Long-term debt	295,931	295,931	295,610
Senior Unsecured Notes | Fair Value
Financial assets:
Long-term debt	300,000	300,000	276,000
Senior Unsecured Notes | Level 1
Financial assets:
Long-term debt	300,000	300,000	276,000
Other long term obligations | Carrying Amount
Financial assets:
Long-term debt	150,300	150,300	135,000
Other long term obligations | Fair Value
Financial assets:
Long-term debt	147,679	$ 147,679	135,000
Other long term obligations | Hollywood Gaming at Dayton Raceway and Mahoning Valley Race Course
Financial assets:
Discount Rate		5.00%
Other long term obligations | Level 2
Financial assets:
Long-term debt	$ 147,679	$ 147,679	$ 135,000