Recent Accounting Pronouncements	3 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements On January 1, 2018, we adopted the Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, No. 2014-09 (and related clarifying guidance issued by the FASB), Revenue From Contracts With Customers, which outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. ASU No. 2014-09 states that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” While ASU No. 2014-09 specifically references contracts with customers, it may apply to certain other transactions such as the sale of real estate or equipment. A substantial portion of our revenue consists of rental income from leasing arrangements, which is specifically excluded from ASU No. 2014-09. We have adopted ASU No. 2014-09 using the modified retrospective approach, which resulted in an adjustment to reclassify a previous deferred gain on sale of real estate of $712 from accounts payable and other liabilities to cumulative net income. The adoption of ASU No. 2014-09 did not have a material impact on the amount or timing of our revenue recognition in our consolidated financial statements except for profit recognition on real estate sales. On January 1, 2018, we adopted FASB ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which changes how entities measure certain equity investments and present changes in the fair value of financial liabilities measured under the fair value option that are attributable to their own credit. The implementation of ASU No. 2016-01 resulted in the reclassification of historical changes in the fair value of our available for sale equity securities of $45,116 from cumulative other comprehensive income to cumulative net income. We also reclassified $14,325 from cumulative other comprehensive income to cumulative net income for our share of cumulative other comprehensive income of our equity method investee, Select Income REIT, or SIR. Effective January 1, 2018, changes in the fair value of our equity securities are recorded through earnings in accordance with ASU No. 2016-01. On January 1, 2018, we adopted FASB ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which clarifies how companies present and classify certain cash receipts and cash payments in the statements of cash flows. The implementation of this update resulted in the reclassification of $736 of accretion recorded in our equity in the earnings of SIR, from cash flow from investing activities to cash flow from operating activities for the three months ended March 31, 2017. See Note 12 for further information regarding our investment in SIR. On January 1, 2018, we adopted FASB ASU No. 2016-18, Restricted Cash, which requires companies to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. The implementation of ASU 2016-18 resulted in a decrease of $173 of net cash provided by operating activities for the three months ended March 31, 2017. This update also requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheets. As a result, amounts included in restricted cash on our condensed consolidated balance sheets are included with cash and cash equivalents on the condensed consolidated statements of cash flows. Restricted cash, which consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts, totaled $4,766 and $703 as of March 31, 2018 and 2017, respectively. The adoption of this update did not change our balance sheet presentation. In February 2016, the FASB issued ASU No. 2016-02, Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). ASU No. 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease. A lessee is also required to record a right of use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales type leases, direct financing leases and operating leases. ASU No. 2016-02 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. We are currently assessing the potential impact the adoption of ASU No. 2016-02 will have in our condensed consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward looking “expected loss” model that generally will result in the earlier recognition of allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. We are currently assessing the potential impact the adoption of ASU No. 2016-13 will have in our condensed consolidated financial statements. We currently expect to adopt the standard using the modified retrospective approach.

Recent Accounting Pronouncements

On January 1, 2018, we adopted the Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, No. 2014-09 (and related clarifying guidance issued by the FASB), Revenue From Contracts With Customers, which outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. ASU No. 2014-09 states that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” While ASU No. 2014-09 specifically references contracts with customers, it may apply to certain other transactions such as the sale of real estate or equipment. A substantial portion of our revenue consists of rental income from leasing arrangements, which is specifically excluded from ASU No. 2014-09. We have adopted ASU No. 2014-09 using the modified retrospective approach, which resulted in an adjustment to reclassify a previous deferred gain on sale of real estate of $712 from accounts payable and other liabilities to cumulative net income. The adoption of ASU No. 2014-09 did not have a material impact on the amount or timing of our revenue recognition in our consolidated financial statements except for profit recognition on real estate sales.

On January 1, 2018, we adopted FASB ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which changes how entities measure certain equity investments and present changes in the fair value of financial liabilities measured under the fair value option that are attributable to their own credit. The implementation of ASU No. 2016-01 resulted in the reclassification of historical changes in the fair value of our available for sale equity securities of $45,116 from cumulative other comprehensive income to cumulative net income. We also reclassified $14,325 from cumulative other comprehensive income to cumulative net income for our share of cumulative other comprehensive income of our equity method investee, Select Income REIT, or SIR. Effective January 1, 2018, changes in the fair value of our equity securities are recorded through earnings in accordance with ASU No. 2016-01.

On January 1, 2018, we adopted FASB ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which clarifies how companies present and classify certain cash receipts and cash payments in the statements of cash flows. The implementation of this update resulted in the reclassification of $736 of accretion recorded in our equity in the earnings of SIR, from cash flow from investing activities to cash flow from operating activities for the three months ended March 31, 2017. See Note 12 for further information regarding our investment in SIR.

On January 1, 2018, we adopted FASB ASU No. 2016-18, Restricted Cash, which requires companies to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. The implementation of ASU 2016-18 resulted in a decrease of $173 of net cash provided by operating activities for the three months ended March 31, 2017. This update also requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheets. As a result, amounts included in restricted cash on our condensed consolidated balance sheets are included with cash and cash equivalents on the condensed consolidated statements of cash flows. Restricted cash, which consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts, totaled $4,766 and $703 as of March 31, 2018 and 2017, respectively. The adoption of this update did not change our balance sheet presentation.

In February 2016, the FASB issued ASU No. 2016-02, Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). ASU No. 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease. A lessee is also required to record a right of use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales type leases, direct financing leases and operating leases. ASU No. 2016-02 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. We are currently assessing the potential impact the adoption of ASU No. 2016-02 will have in our condensed consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward looking “expected loss” model that generally will result in the earlier recognition of allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. We are currently assessing the potential impact the adoption of ASU No. 2016-13 will have in our condensed consolidated financial statements. We currently expect to adopt the standard using the modified retrospective approach.