Leases - Marketing and the Master Lease - Additional Information (Detail)				1 Months Ended		3 Months Ended	12 Months Ended
	Nov. 03, 2015 USD ($)	Mar. 03, 2015 USD ($)	Jul. 29, 2013 USD ($)	Aug. 31, 2013 USD ($)	Oct. 31, 2012 USD ($)	Sep. 30, 2013 USD ($)	Dec. 31, 2015 USD ($) Property Portfolios	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 USD ($)
Leases [Line Items]
Collective payment by or on behalf of the defendants	$ 10,800,000							$ 3,126,000
Number of new triple net leases entered into during the period | Portfolios							15
Number of leased properties with new tenants | Property							360
Maximum lease commitment for capital expenditure							$ 11,917,000
Asset retirement obligations removed from balance sheet							13,403,000
Deferred rental revenue							2,731,000
Lease origination costs							$ 120,000	365,000		$ 60,000
Properties under license agreements | Property							15
USTs [Member]
Leases [Line Items]
Asset retirement obligations removed from balance sheet							$ 13,403,000
Net asset retirement cost related to USTs removed from the balance sheet							10,672,000			$ 10,672,000
Deferred rental revenue							$ 2,731,000
Minimum [Member]
Leases [Line Items]
Unitary triple-net lease agreements initial terms							15 years
Maximum [Member]
Leases [Line Items]
Unitary triple-net lease agreements successive terms							20 years
Getty Petroleum Marketing Inc [Member]
Leases [Line Items]
Number of properties previously leased | Property							400
Litigation Funding Agreement [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants						$ 25,096,000
Post Petition Priority Claims [Member] | Master Lease [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants				$ 6,585,000
Marketing Estate [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants			$ 93,000,000
Loan received							$ 18,177,000
Marketing Estate [Member] | Getty Petroleum Marketing Inc [Member]
Leases [Line Items]
Post-petition priority claims and Lukoil Settlement								34,251,000
Marketing Estate [Member] | Getty Petroleum Marketing Inc [Member] | Reduction in General and Administrative Expenses in Continuing Operations [Member]
Leases [Line Items]
Post-petition priority claims and Lukoil Settlement								16,963,000
Marketing Estate [Member] | Getty Petroleum Marketing Inc [Member] | Increase In Earnings from Operating Activities Included in Discontinued Operations [Member]
Leases [Line Items]
Post-petition priority claims and Lukoil Settlement								5,819,000
Marketing Estate [Member] | Accrued Interest [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants						7,976,000
Marketing Estate [Member] | Bad Debt Reserve for Uncollectible Amounts [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants						13,994,000
Marketing Estate [Member] | Additional Income Attributed To Master Lease [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants						$ 3,126,000
Marketing Estate [Member] | Bad Debt Reserve for Uncollectible Amounts [Member] | Getty Petroleum Marketing Inc [Member]
Leases [Line Items]
Post-petition priority claims and Lukoil Settlement								$ 22,782,000
Marketing Estate [Member] | Litigation Funding Agreement [Member]
Leases [Line Items]
Maximum dollar amount of loans to the Marketing Estate per agreement					$ 6,725,000
Amount advanced to the Marketing Estate for wind down expenses									$ 6,526,000
Collective payment by or on behalf of the defendants				$ 25,096,000
Marketing Estate [Member] | Litigation Funding Agreement [Member] | Legal Fees [Member]
Leases [Line Items]
Collective payment by or on behalf of the defendants							$ 1,300,000
Marketing Estate Liquidating Trustee [Member]
Leases [Line Items]
Settlement agreement date							Mar. 03, 2015
Settlement agreement hearing date							Apr. 22, 2015
Interim distribution amount		$ 6,800,000
Marketing Estate Liquidating Trustee [Member] | Settlement Agreement [Member]
Leases [Line Items]
Additional distribution amount		$ 550,000