Summary of Significant Accounting Policies - Segment Information (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Kansas Entertainment
Segment Information
Ownership interest in joint venture (as a percent)	50.00%	50.00%
Penn Interactive Ventures | Maximum
Segment Information
Percent of net revenue	2.00%	2.00%
Percent of income from operations	2.00%	2.00%
Percent of total assets	2.00%	2.00%