Environmental Obligations	9 Months Ended
Sep. 30, 2016
Environmental Remediation Obligations [Abstract]
Environmental Obligations	NOTE 6. — ENVIRONMENTAL OBLIGATIONS We are subject to numerous federal, state and local laws and regulations, including matters relating to the protection of the environment such as the remediation of known contamination and the retirement and decommissioning or removal of long-lived assets including buildings containing hazardous materials, USTs and other equipment. Environmental costs are principally attributable to remediation costs which include removing USTs, excavation of contaminated soil and water, installing, operating, maintaining and decommissioning remediation systems, monitoring contamination and governmental agency compliance reporting incurred in connection with contaminated properties. We seek reimbursement from state UST remediation funds related to these environmental costs where available. In July 2012, we purchased a ten-year pollution legal liability insurance policy covering substantially all of our properties for preexisting unknown environmental liabilities and new environmental events. The policy has a $50,000,000 aggregate limit and is subject to various self-insured retentions and other conditions and limitations. Our intention in purchasing this policy was to obtain protection predominantly for significant events. No assurances can be given that we will obtain a net financial benefit from this investment. The estimated future costs for known environmental remediation requirements are accrued when it is probable that a liability has been incurred and a reasonable estimate of fair value can be made. The accrued liability is the aggregate of the best estimate of the fair value of cost for each component of the liability net of estimated recoveries from state UST remediation funds considering estimated recovery rates developed from prior experience with the funds. We enter into leases and various other agreements which contractually allocate responsibility between the parties for known and unknown environmental liabilities at or relating to the subject properties. We are contingently liable for these environmental obligations in the event that our counterparty to the lease or other agreement does not satisfy them. It is possible that our assumptions regarding the ultimate allocation method and share of responsibility that we used to allocate environmental liabilities may change, which may result in material adjustments to the amounts recorded for environmental litigation accruals and environmental remediation liabilities. We are required to accrue for environmental liabilities that we believe are allocable to others under leases and other agreements if we determine that it is probable that our counterparty will not meet its environmental obligations. We may ultimately be responsible to pay for environmental liabilities as the property owner if our counterparty fails to pay them. We assess whether to accrue for environmental liabilities based upon relevant factors including our tenants’ histories of paying for such obligations, our assessment of their financial ability, and their intent to pay for such obligations. However, there can be no assurance that our assessments are correct or that our tenants who have paid their obligations in the past will continue to do so. The ultimate resolution of these matters could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price. For all of our triple-net leases, our tenants are contractually responsible for compliance with environmental laws and regulations, removal of USTs at the end of their lease term (the cost of which in certain cases is partially borne by us), and remediation of any environmental contamination that arises during the term of their tenancy. Under the terms of our leases covering properties previously leased to Marketing (substantially all of which commenced in 2012), we have agreed to be responsible for environmental contamination at the premises that was known at the time the lease commenced, and which existed prior to commencement of the lease and is discovered (other than as a result of a voluntary site investigation) during the first ten years of the lease term (or a shorter period for a minority of such leases). After expiration of such ten-year (or, in certain cases, shorter) period, responsibility for all newly discovered contamination, even if it relates to periods prior to commencement of the lease, is contractually allocated to our tenant. Our tenants at properties previously leased to Marketing are in all cases responsible for the cost of any remediation of contamination that results from their use and occupancy of our properties. Under substantially all of our other triple-net leases, responsibility for remediation of all environmental contamination discovered during the term of the lease (including known and unknown contamination that existed prior to commencement of the lease) is the responsibility of our tenant. We anticipate that a majority of the USTs at properties previously leased to Marketing will be replaced over the next decade because these USTs are either at or near the end of their useful lives. For long-term, triple-net leases covering sites previously leased to Marketing, our tenants are responsible for the cost of removal and replacement of USTs and for remediation of contamination found during such UST removal and replacement, unless such contamination was found during the first ten years of the lease term and also existed prior to commencement of the lease. In those cases, we are responsible for costs associated with the remediation of such contamination. For our transitional properties occupied under month-to-month license agreements, or which are vacant, we are responsible for costs associated with UST removals and for the cost of remediation of contamination found during the removal of USTs. We have also agreed to be responsible for environmental contamination that existed prior to the sale of certain properties assuming the contamination is discovered (other than as a result of a voluntary site investigation) during the first five years after the sale of the properties. After the termination of the Master Lease, we commenced a process to take control of our properties and to reposition them. A substantial portion of these properties had USTs which were either at or near the end of their useful lives. For properties that we sold, we elected to remove certain of these USTs and in the course of re-leasing properties, we made lease concessions to reimburse our tenants for certain capital expenditures including UST replacements. In the course of these UST removals and replacements, previously unknown environmental contamination has been and continues to be discovered. As a result of these developments, we began to assess our prospective future environmental liability resulting from preexisting unknown environmental contamination which we believe may be discovered during the future removal and replacement of USTs at properties previously leased to Marketing. We have developed a reasonable estimate of fair value for the prospective future environmental liability resulting from preexisting unknown environmental contamination and accrued for these estimated costs. These estimates are based primarily upon quantifiable trends, which we believe allow us to make reasonable estimates of fair value for the future costs of environmental remediation resulting from the removal and replacement of USTs. Our accrual of the additional liability represents the best estimate of the fair value of cost for each component of the liability, net of estimated recoveries from state UST remediation funds, considering estimated recovery rates developed from prior experience with the funds. In arriving at our accrual, we analyzed the ages of USTs at properties where we would be responsible for preexisting contamination found within ten years after commencement of a lease (for properties subject to long-term triple-net leases) or five years from a sale (for divested properties), and projected a cost to closure for new environmental contamination. Based on these estimates, along with relevant economic and risk factors, at September 30, 2016 and December 31, 2015, we have accrued $44,772,000 and $45,443,000, respectively, for these future environmental liabilities related to preexisting unknown contamination. Our estimates are based upon facts that are known to us at this time and an assessment of the possible ultimate remedial action outcomes. It is possible that our assumptions, which form the basis of our estimates, regarding our ultimate environmental liabilities may change, which may result in our providing an accrual, or adjustments to the amounts recorded, for environmental remediation liabilities. Among the many uncertainties that impact the estimates are our assumptions, the necessary regulatory approvals for, and potential modifications of, remediation plans, the amount of data available upon initial assessment of contamination, changes in costs associated with environmental remediation services and equipment, the availability of state UST remediation funds and the possibility of existing legal claims giving rise to additional claims. Additional environmental liabilities could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price. Environmental exposures are difficult to assess and estimate for numerous reasons, including the extent of contamination, alternative treatment methods that may be applied, location of the property which subjects it to differing local laws and regulations and their interpretations, as well as the time it takes to remediate contamination and receive regulatory approval. In developing our liability for estimated environmental remediation obligations on a property by property basis, we consider, among other things, enacted laws and regulations, assessments of contamination and surrounding geology, quality of information available, currently available technologies for treatment, alternative methods of remediation and prior experience. Environmental accruals are based on estimates which are subject to significant change, and are adjusted as the remediation treatment progresses, as circumstances change and as environmental contingencies become more clearly defined and reasonably estimable. We expect to adjust the accrued liabilities for environmental remediation obligations reflected in our consolidated financial statements as they become probable and a reasonable estimate of fair value can be made. We measure our environmental remediation liability at fair value based on expected future net cash flows, adjusted for inflation (using a range of 2.0% to 2.75%), and then discount them to present value (using a range of 4.0% to 7.0%). We adjust our environmental remediation liability quarterly to reflect changes in projected expenditures, changes in present value due to the passage of time and reductions in estimated liabilities as a result of actual expenditures incurred during each quarter. As of September 30, 2016, we had accrued a total of $78,525,000 for our prospective environmental remediation liability. This accrual includes (a) $33,753,000, which was our best estimate of reasonably estimable environmental remediation obligations and obligations to remove USTs for which we are the title owner, net of estimated recoveries and (b) $44,772,000 for future environmental liabilities related to preexisting unknown contamination. As of December 31, 2015, we had accrued a total of $84,345,000 for our prospective environmental remediation liability. This accrual includes (a) $38,902,000, which was our best estimate of reasonably estimable environmental remediation obligations and obligations to remove USTs for which we are the title owner, net of estimated recoveries and (b) $45,443,000 for future environmental liabilities related to preexisting unknown contamination. Environmental liabilities are accreted for the change in present value due to the passage of time and, accordingly, $3,020,000 and $3,519,000 of net accretion expense was recorded for the nine months ended September 30, 2016 and 2015, respectively, which is included in environmental expenses. In addition, during the nine months ended September 30, 2016 and 2015, we recorded credits to environmental expenses included in continuing operations and to earnings from operating activities in discontinued operations aggregating $3,804,000 and $2,035,000, respectively, where decreases in estimated remediation costs exceeded the depreciated carrying value of previously capitalized asset retirement costs. Environmental expenses also include project management fees, legal fees and provisions for environmental litigation losses. During the nine months ended September 30, 2016 and 2015, we increased the carrying value of certain of our properties by $5,384,000 and $8,892,000, respectively, due to increases in estimated environmental remediation costs. The recognition and subsequent changes in estimates in environmental liabilities and the increases or decreases in carrying values of the properties are non-cash transactions which do not appear on the face of the consolidated statements of cash flows. We recorded impairment charges aggregating $6,232,000 and $10,598,000 for the nine months ended September 30, 2016 and 2015, respectively, in continuing operations and in discontinued operations for capitalized asset retirement costs. Capitalized asset retirement costs are being depreciated over the estimated remaining life of the UST, a ten-year period if the increase in carrying value is related to environmental remediation obligations or such shorter period if circumstances warrant, such as the remaining lease term for properties we lease from others. Depreciation and amortization expense included in continuing operations and earnings from discontinued operations in our consolidated statements of operations for the nine months ended September 30, 2016 and 2015, included $3,934,000 and $4,646,000, respectively, related to capitalized asset retirement costs. Capitalized asset retirement costs were $48,981,000 (consisting of $20,234,000 of known environmental liabilities and $28,747,000 of reserves for future environmental liabilities) and $51,393,000 (consisting of $20,939,000 of known environmental liabilities and $30,454,000 of reserves for future environmental liabilities) as of September 30, 2016 and December 31, 2015, respectively. As part of the triple-net leases for properties previously leased to Marketing, we transferred title of the USTs to our tenants, and the obligation to pay for the retirement and decommissioning or removal of USTs at the end of their useful life or earlier if circumstances warranted was fully or partially transferred to our new tenants. We remain contingently liable for this obligation in the event that our tenants do not satisfy their responsibilities. Accordingly, through September 30, 2016, we removed $13,769,000 of asset retirement obligations and $10,808,000 of net asset retirement costs related to USTs from our balance sheet. The cumulative net amount of $2,961,000 is recorded as deferred rental revenue and will be recognized on a straight-line basis as additional revenues from rental properties over the terms of the various leases. We cannot predict what environmental legislation or regulations may be enacted in the future or how existing laws or regulations will be administered or interpreted with respect to products or activities to which they have not previously been applied. We cannot predict if state UST fund programs will be administered and funded in the future in a manner that is consistent with past practices and if future environmental spending will continue to be eligible for reimbursement at historical recovery rates under these programs. Compliance with more stringent laws or regulations, as well as more vigorous enforcement policies of the regulatory agencies or stricter interpretation of existing laws, which may develop in the future, could have an adverse effect on our financial position, or that of our tenants, and could require substantial additional expenditures for future remediation. In light of the uncertainties associated with environmental expenditure contingencies, we are unable to estimate ranges in excess of the amount accrued with any certainty; however, we believe it is possible that the fair value of future actual net expenditures could be substantially higher than amounts currently recorded by us. Adjustments to accrued liabilities for environmental remediation obligations will be reflected in our consolidated financial statements as they become probable and a reasonable estimate of fair value can be made. Future environmental expenses could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price.

NOTE 6. — ENVIRONMENTAL OBLIGATIONS

We are subject to numerous federal, state and local laws and regulations, including matters relating to the protection of the environment such as the remediation of known contamination and the retirement and decommissioning or removal of long-lived assets including buildings containing hazardous materials, USTs and other equipment. Environmental costs are principally attributable to remediation costs which include removing USTs, excavation of contaminated soil and water, installing, operating, maintaining and decommissioning remediation systems, monitoring contamination and governmental agency compliance reporting incurred in connection with contaminated properties. We seek reimbursement from state UST remediation funds related to these environmental costs where available. In July 2012, we purchased a ten-year pollution legal liability insurance policy covering substantially all of our properties for preexisting unknown environmental liabilities and new environmental events. The policy has a $50,000,000 aggregate limit and is subject to various self-insured retentions and other conditions and limitations. Our intention in purchasing this policy was to obtain protection predominantly for significant events. No assurances can be given that we will obtain a net financial benefit from this investment.

The estimated future costs for known environmental remediation requirements are accrued when it is probable that a liability has been incurred and a reasonable estimate of fair value can be made. The accrued liability is the aggregate of the best estimate of the fair value of cost for each component of the liability net of estimated recoveries from state UST remediation funds considering estimated recovery rates developed from prior experience with the funds.

We enter into leases and various other agreements which contractually allocate responsibility between the parties for known and unknown environmental liabilities at or relating to the subject properties. We are contingently liable for these environmental obligations in the event that our counterparty to the lease or other agreement does not satisfy them. It is possible that our assumptions regarding the ultimate allocation method and share of responsibility that we used to allocate environmental liabilities may change, which may result in material adjustments to the amounts recorded for environmental litigation accruals and environmental remediation liabilities. We are required to accrue for environmental liabilities that we believe are allocable to others under leases and other agreements if we determine that it is probable that our counterparty will not meet its environmental obligations. We may ultimately be responsible to pay for environmental liabilities as the property owner if our counterparty fails to pay them. We assess whether to accrue for environmental liabilities based upon relevant factors including our tenants’ histories of paying for such obligations, our assessment of their financial ability, and their intent to pay for such obligations. However, there can be no assurance that our assessments are correct or that our tenants who have paid their obligations in the past will continue to do so. The ultimate resolution of these matters could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price.

For all of our triple-net leases, our tenants are contractually responsible for compliance with environmental laws and regulations, removal of USTs at the end of their lease term (the cost of which in certain cases is partially borne by us), and remediation of any environmental contamination that arises during the term of their tenancy. Under the terms of our leases covering properties previously leased to Marketing (substantially all of which commenced in 2012), we have agreed to be responsible for environmental contamination at the premises that was known at the time the lease commenced, and which existed prior to commencement of the lease and is discovered (other than as a result of a voluntary site investigation) during the first ten years of the lease term (or a shorter period for a minority of such leases). After expiration of such ten-year (or, in certain cases, shorter) period, responsibility for all newly discovered contamination, even if it relates to periods prior to commencement of the lease, is contractually allocated to our tenant. Our tenants at properties previously leased to Marketing are in all cases responsible for the cost of any remediation of contamination that results from their use and occupancy of our properties. Under substantially all of our other triple-net leases, responsibility for remediation of all environmental contamination discovered during the term of the lease (including known and unknown contamination that existed prior to commencement of the lease) is the responsibility of our tenant.

We anticipate that a majority of the USTs at properties previously leased to Marketing will be replaced over the next decade because these USTs are either at or near the end of their useful lives. For long-term, triple-net leases covering sites previously leased to Marketing, our tenants are responsible for the cost of removal and replacement of USTs and for remediation of contamination found during such UST removal and replacement, unless such contamination was found during the first ten years of the lease term and also existed prior to commencement of the lease. In those cases, we are responsible for costs associated with the remediation of such contamination. For our transitional properties occupied under month-to-month license agreements, or which are vacant, we are responsible for costs associated with UST removals and for the cost of remediation of contamination found during the removal of USTs. We have also agreed to be responsible for environmental contamination that existed prior to the sale of certain properties assuming the contamination is discovered (other than as a result of a voluntary site investigation) during the first five years after the sale of the properties.

After the termination of the Master Lease, we commenced a process to take control of our properties and to reposition them. A substantial portion of these properties had USTs which were either at or near the end of their useful lives. For properties that we sold, we elected to remove certain of these USTs and in the course of re-leasing properties, we made lease concessions to reimburse our tenants for certain capital expenditures including UST replacements. In the course of these UST removals and replacements, previously unknown environmental contamination has been and continues to be discovered. As a result of these developments, we began to assess our prospective future environmental liability resulting from preexisting unknown environmental contamination which we believe may be discovered during the future removal and replacement of USTs at properties previously leased to Marketing.

We have developed a reasonable estimate of fair value for the prospective future environmental liability resulting from preexisting unknown environmental contamination and accrued for these estimated costs. These estimates are based primarily upon quantifiable trends, which we believe allow us to make reasonable estimates of fair value for the future costs of environmental remediation resulting from the removal and replacement of USTs. Our accrual of the additional liability represents the best estimate of the fair value of cost for each component of the liability, net of estimated recoveries from state UST remediation funds, considering estimated recovery rates developed from prior experience with the funds. In arriving at our accrual, we analyzed the ages of USTs at properties where we would be responsible for preexisting contamination found within ten years after commencement of a lease (for properties subject to long-term triple-net leases) or five years from a sale (for divested properties), and projected a cost to closure for new environmental contamination. Based on these estimates, along with relevant economic and risk factors, at September 30, 2016 and December 31, 2015, we have accrued $44,772,000 and $45,443,000, respectively, for these future environmental liabilities related to preexisting unknown contamination. Our estimates are based upon facts that are known to us at this time and an assessment of the possible ultimate remedial action outcomes. It is possible that our assumptions, which form the basis of our estimates, regarding our ultimate environmental liabilities may change, which may result in our providing an accrual, or adjustments to the amounts recorded, for environmental remediation liabilities. Among the many uncertainties that impact the estimates are our assumptions, the necessary regulatory approvals for, and potential modifications of, remediation plans, the amount of data available upon initial assessment of contamination, changes in costs associated with environmental remediation services and equipment, the availability of state UST remediation funds and the possibility of existing legal claims giving rise to additional claims. Additional environmental liabilities could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price.

Environmental exposures are difficult to assess and estimate for numerous reasons, including the extent of contamination, alternative treatment methods that may be applied, location of the property which subjects it to differing local laws and regulations and their interpretations, as well as the time it takes to remediate contamination and receive regulatory approval. In developing our liability for estimated environmental remediation obligations on a property by property basis, we consider, among other things, enacted laws and regulations, assessments of contamination and surrounding geology, quality of information available, currently available technologies for treatment, alternative methods of remediation and prior experience. Environmental accruals are based on estimates which are subject to significant change, and are adjusted as the remediation treatment progresses, as circumstances change and as environmental contingencies become more clearly defined and reasonably estimable. We expect to adjust the accrued liabilities for environmental remediation obligations reflected in our consolidated financial statements as they become probable and a reasonable estimate of fair value can be made.

We measure our environmental remediation liability at fair value based on expected future net cash flows, adjusted for inflation (using a range of 2.0% to 2.75%), and then discount them to present value (using a range of 4.0% to 7.0%). We adjust our environmental remediation liability quarterly to reflect changes in projected expenditures, changes in present value due to the passage of time and reductions in estimated liabilities as a result of actual expenditures incurred during each quarter. As of September 30, 2016, we had accrued a total of $78,525,000 for our prospective environmental remediation liability. This accrual includes (a) $33,753,000, which was our best estimate of reasonably estimable environmental remediation obligations and obligations to remove USTs for which we are the title owner, net of estimated recoveries and (b) $44,772,000 for future environmental liabilities related to preexisting unknown contamination. As of December 31, 2015, we had accrued a total of $84,345,000 for our prospective environmental remediation liability. This accrual includes (a) $38,902,000, which was our best estimate of reasonably estimable environmental remediation obligations and obligations to remove USTs for which we are the title owner, net of estimated recoveries and (b) $45,443,000 for future environmental liabilities related to preexisting unknown contamination.

Environmental liabilities are accreted for the change in present value due to the passage of time and, accordingly, $3,020,000 and $3,519,000 of net accretion expense was recorded for the nine months ended September 30, 2016 and 2015, respectively, which is included in environmental expenses. In addition, during the nine months ended September 30, 2016 and 2015, we recorded credits to environmental expenses included in continuing operations and to earnings from operating activities in discontinued operations aggregating $3,804,000 and $2,035,000, respectively, where decreases in estimated remediation costs exceeded the depreciated carrying value of previously capitalized asset retirement costs. Environmental expenses also include project management fees, legal fees and provisions for environmental litigation losses.

During the nine months ended September 30, 2016 and 2015, we increased the carrying value of certain of our properties by $5,384,000 and $8,892,000, respectively, due to increases in estimated environmental remediation costs. The recognition and subsequent changes in estimates in environmental liabilities and the increases or decreases in carrying values of the properties are non-cash transactions which do not appear on the face of the consolidated statements of cash flows. We recorded impairment charges aggregating $6,232,000 and $10,598,000 for the nine months ended September 30, 2016 and 2015, respectively, in continuing operations and in discontinued operations for capitalized asset retirement costs. Capitalized asset retirement costs are being depreciated over the estimated remaining life of the UST, a ten-year period if the increase in carrying value is related to environmental remediation obligations or such shorter period if circumstances warrant, such as the remaining lease term for properties we lease from others. Depreciation and amortization expense included in continuing operations and earnings from discontinued operations in our consolidated statements of operations for the nine months ended September 30, 2016 and 2015, included $3,934,000 and $4,646,000, respectively, related to capitalized asset retirement costs. Capitalized asset retirement costs were $48,981,000 (consisting of $20,234,000 of known environmental liabilities and $28,747,000 of reserves for future environmental liabilities) and $51,393,000 (consisting of $20,939,000 of known environmental liabilities and $30,454,000 of reserves for future environmental liabilities) as of September 30, 2016 and December 31, 2015, respectively.

As part of the triple-net leases for properties previously leased to Marketing, we transferred title of the USTs to our tenants, and the obligation to pay for the retirement and decommissioning or removal of USTs at the end of their useful life or earlier if circumstances warranted was fully or partially transferred to our new tenants. We remain contingently liable for this obligation in the event that our tenants do not satisfy their responsibilities. Accordingly, through September 30, 2016, we removed $13,769,000 of asset retirement obligations and $10,808,000 of net asset retirement costs related to USTs from our balance sheet. The cumulative net amount of $2,961,000 is recorded as deferred rental revenue and will be recognized on a straight-line basis as additional revenues from rental properties over the terms of the various leases.

We cannot predict what environmental legislation or regulations may be enacted in the future or how existing laws or regulations will be administered or interpreted with respect to products or activities to which they have not previously been applied. We cannot predict if state UST fund programs will be administered and funded in the future in a manner that is consistent with past practices and if future environmental spending will continue to be eligible for reimbursement at historical recovery rates under these programs. Compliance with more stringent laws or regulations, as well as more vigorous enforcement policies of the regulatory agencies or stricter interpretation of existing laws, which may develop in the future, could have an adverse effect on our financial position, or that of our tenants, and could require substantial additional expenditures for future remediation.

In light of the uncertainties associated with environmental expenditure contingencies, we are unable to estimate ranges in excess of the amount accrued with any certainty; however, we believe it is possible that the fair value of future actual net expenditures could be substantially higher than amounts currently recorded by us. Adjustments to accrued liabilities for environmental remediation obligations will be reflected in our consolidated financial statements as they become probable and a reasonable estimate of fair value can be made. Future environmental expenses could cause a material adverse effect on our business, financial condition, results of operations, liquidity, ability to pay dividends or stock price.