Commitments and Contingencies	12 Months Ended
Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 9 – Commitments and Contingencies Insurance The Company maintains general liability insurance and all-risk property and rental value, with sub-limits for certain perils such as floods and earthquakes on each of the Company’s properties. The Company also maintains coverage for terrorism acts as defined by Terrorism Risk Insurance Program Reauthorization Act, which expires in December 2020. Insurance premiums are charged directly to each of the retail properties. The Company will be responsible for deductibles and losses in excess of insurance coverage, which could be material. The Company continues to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism. However, the Company cannot anticipate what coverage will be available on commercially reasonable terms in the future. Environmental Matters Under various federal, state and local laws, ordinances and regulations, the Company may be considered an owner or operator of real property or may have arranged for the disposal or treatment of hazardous or toxic substances. As a result, the Company may be liable for certain costs including removal, remediation, government fines and injuries to persons and property. The Company does not believe that any resulting liability from such matters will have a material effect on the consolidated financial position, results of operations or liquidity of the Company. Under the Master Lease, Sears Holdings has indemnified the Company from certain environmental liabilities at the Wholly Owned Properties existing before, or caused by Sears Holdings during, the period in which each Wholly Owned Property is leased to Sears Holdings, including removal and remediation of all affected facilities and equipment constituting the automotive care center facilities (and each JV Master Lease includes a similar requirement of Sears Holdings). As of December 31, 2017 and December 31, 2016, the Company had approximately $10.8 million and $11.8 million, respectively, of restricted cash in a lender reserve account to fund potential environmental costs that were identified during due diligence related to the Transaction. Litigation and Other Matters In accordance with accounting standards regarding loss contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued or disclose the fact that such a range of loss cannot be estimated. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote. In such cases, the Company discloses the nature of the contingency, and an estimate of the possible loss, range of loss, or disclose the fact that an estimate cannot be made. The Company is subject, from time to time, to various legal proceedings and claims that arise in the ordinary course of business. While the resolution of such matters cannot be predicted with certainty, management believes, based on currently available information, that the final outcome of such matters will not have a material effect on the consolidated financial position, results of operations, cash flows or liquidity of the Company. In May and June of 2015, four purported Sears Holdings shareholders filed lawsuits in the Delaware Court of Chancery challenging the Transaction, which lawsuits were subsequently consolidated into a single action captioned In re Sears Holdings Corporation Stockholder and Derivative Litigation, Consol. C.A. No. 11081-VCL (the “Action”). On October 15, 2015, plaintiffs filed a verified consolidated stockholder derivative complaint in the Action against the individual members of Sears Holdings’ Board of Directors, ESL Investments, Inc. (together with its affiliates, “ESL”), Sears Holdings’ CEO, Fairholme Capital Management L.L.C. (“FCM”), and Seritage. On July 12, 2016, the plaintiffs filed a verified consolidated amended stockholder derivative complaint (the “Amended Complaint”) against the same defendants and asserting substantially the same claims as set forth in the complaint filed in October 2015. The plaintiffs brought the Action derivatively on behalf of Sears Holdings, which was named as a nominal defendant, and alleged that the Sears Holdings directors, as well as ESL and Edwards S. Lampert (in their capacity as the alleged controlling stockholder of Sears Holdings), breached their fiduciary duties to Sears Holdings shareholders by selling the Wholly Owned Properties to Seritage at a price that was unfairly low and was the result of a process that allegedly was flawed. The Amended Complaint also alleged that Seritage and FCM aided and abetted these alleged fiduciary breaches. Among other forms of relief, the Amended Complaint sought damages in unspecified amounts. In October 2016, following mediation, the parties reached an agreement-in-principle to settle the Action, which ultimately was reflected in a definitive Stipulation and Agreement of Settlement, Compromise and Release executed on February 8, 2017. On May 9, 2017, the Delaware Court of Chancery, after customary notice to Sears Holding stockholders and an in-person settlement hearing, entered a final order and judgment approving the settlement. Pursuant to the settlement, (a) the defendants and the D&O insurers for the individual members of the Sears Holdings’ Board of Directors paid $40.0 million, of which Seritage paid $19.0 million and (b) all defendants received customary releases. The defendants continue to deny the claims asserted and entered into the settlement solely to avoid the burden, expense, distraction, and inherent risk in and of litigation.

Note 9 – Commitments and Contingencies

Insurance

The Company maintains general liability insurance and all-risk property and rental value, with sub-limits for certain perils such as floods and earthquakes on each of the Company’s properties. The Company also maintains coverage for terrorism acts as defined by Terrorism Risk Insurance Program Reauthorization Act, which expires in December 2020.

Insurance premiums are charged directly to each of the retail properties. The Company will be responsible for deductibles and losses in excess of insurance coverage, which could be material. The Company continues to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism. However, the Company cannot anticipate what coverage will be available on commercially reasonable terms in the future.

Environmental Matters

Under various federal, state and local laws, ordinances and regulations, the Company may be considered an owner or operator of real property or may have arranged for the disposal or treatment of hazardous or toxic substances. As a result, the Company may be liable for certain costs including removal, remediation, government fines and injuries to persons and property. The Company does not believe that any resulting liability from such matters will have a material effect on the consolidated financial position, results of operations or liquidity of the Company. Under the Master Lease, Sears Holdings has indemnified the Company from certain environmental liabilities at the Wholly Owned Properties existing before, or caused by Sears Holdings during, the period in which each Wholly Owned Property is leased to Sears Holdings, including removal and remediation of all affected facilities and equipment constituting the automotive care center facilities (and each JV Master Lease includes a similar requirement of Sears Holdings). As of December 31, 2017 and December 31, 2016, the Company had approximately $10.8 million and $11.8 million, respectively, of restricted cash in a lender reserve account to fund potential environmental costs that were identified during due diligence related to the Transaction.

Litigation and Other Matters

In accordance with accounting standards regarding loss contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued or disclose the fact that such a range of loss cannot be estimated. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote. In such cases, the Company discloses the nature of the contingency, and an estimate of the possible loss, range of loss, or disclose the fact that an estimate cannot be made.

The Company is subject, from time to time, to various legal proceedings and claims that arise in the ordinary course of business. While the resolution of such matters cannot be predicted with certainty, management believes, based on currently available information, that the final outcome of such matters will not have a material effect on the consolidated financial position, results of operations, cash flows or liquidity of the Company.

In May and June of 2015, four purported Sears Holdings shareholders filed lawsuits in the Delaware Court of Chancery challenging the Transaction, which lawsuits were subsequently consolidated into a single action captioned In re Sears Holdings Corporation Stockholder and Derivative Litigation, Consol. C.A. No. 11081-VCL (the “Action”). On October 15, 2015, plaintiffs filed a verified consolidated stockholder derivative complaint in the Action against the individual members of Sears Holdings’ Board of Directors, ESL Investments, Inc. (together with its affiliates, “ESL”), Sears Holdings’ CEO, Fairholme Capital Management L.L.C. (“FCM”), and Seritage. On July 12, 2016, the plaintiffs filed a verified consolidated amended stockholder derivative complaint (the “Amended Complaint”) against the same defendants and asserting substantially the same claims as set forth in the complaint filed in October 2015. The plaintiffs brought the Action derivatively on behalf of Sears Holdings, which was named as a nominal defendant, and alleged that the Sears Holdings directors, as well as ESL and Edwards S. Lampert (in their capacity as the alleged controlling stockholder of Sears Holdings), breached their fiduciary duties to Sears Holdings shareholders by selling the Wholly Owned Properties to Seritage at a price that was unfairly low and was the result of a process that allegedly was flawed. The Amended Complaint also alleged that Seritage and FCM aided and abetted these alleged fiduciary breaches. Among other forms of relief, the Amended Complaint sought damages in unspecified amounts. In October 2016, following mediation, the parties reached an agreement-in-principle to settle the Action, which ultimately was reflected in a definitive Stipulation and Agreement of Settlement, Compromise and Release executed on February 8, 2017. On May 9, 2017, the Delaware Court of Chancery, after customary notice to Sears Holding stockholders and an in-person settlement hearing, entered a final order and judgment approving the settlement. Pursuant to the settlement, (a) the defendants and the D&O insurers for the individual members of the Sears Holdings’ Board of Directors paid $40.0 million, of which Seritage paid $19.0 million and (b) all defendants received customary releases. The defendants continue to deny the claims asserted and entered into the settlement solely to avoid the burden, expense, distraction, and inherent risk in and of litigation.