XML 12 R1.htm IDEA: XBRL DOCUMENT v3.3.1.900
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2015
Mar. 02, 2016
Document and Entity Information    
Entity Registrant Name PENN NATIONAL GAMING INC  
Entity Central Index Key 0000921738  
Document Type 10-Q  
Document Period End Date Sep. 30, 2015  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   81,220,032
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3