Summary of Significant Accounting Policies (Concentration of Credit Risk) (Details)	Dec. 31, 2021 state property
Cash and Cash Equivalents [Abstract]
Number of facilities whose real estate property is included in entity portfolio \| property	(51)
Number of states across which the portfolio of properties is diversified \| state	17

Represents the number of facilities whose real property is included in the entity's portfolio as of the balance sheet date.

No definition available.

Name:	glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio
Namespace Prefix:	glpi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant