Recent Accounting Pronouncements (Policies)	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
Recent Accounting Pronouncements	On January 1, 2018, we adopted ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments, which adds or clarifies guidance of the classification of certain cash receipts and payments in the statement of cash flows, and ASU 2016-18, Restricted Cash, which requires an entity to show the changes in total cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. We adopted these ASUs by applying a retrospective transition method. In 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” which requires lessees to recognize assets and liabilities on their consolidated balance sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their consolidated statements of comprehensive income over the lease term. It will also require disclosures designed to give financial statement users information regarding amount, timing, and uncertainty of cash flows arising from leases. The FASB issued ASU 2018-11, "Leases (Topic 842) Targeted Improvements" in July 2018, which provides lessors with a practical expedient, by class of underlying assets, to not separate non-lease components from the related lease components, and, instead, to account for those components as a single lease component, if certain criteria are met. ASU 2016-02 is effective for us beginning January 1, 2019, with early adoption permitted. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the consolidated financial statements. ASU 2018-11 also provides a practical expedient that allows companies to use an optional transition method. Under the optional transition method, a cumulative adjustment to retained earnings during the period of adoption is recorded and prior periods would not require restatement. At this time, the primary impact is expected to be related to our ground leases, in which we serve as lessee. We are currently evaluating the impact of this guidance on our consolidated financial statements from both the lessee and lessor perspective. On January 1, 2018, we adopted ASU 2014-09, Revenue From Contracts With Customers (“ASU 2014-09”), which outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted the standard on January 1, 2018, using the modified retrospective approach, which requires a cumulative-effect adjustment to equity as of the date of adoption. ASU 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 2014-09 specifically references contracts with customers, it may apply to certain other transactions such as the sale of real estate or equipment. The adoption of this standard did not have a significant impact on our consolidated financial statements and no cumulative adjustment was recorded upon adoption, as a substantial portion of our revenue consists of rental income from leasing arrangements, which is specifically excluded from ASU 2014-09. Our revenues consist primarily of rentals received from tenants, which are comprised of minimum rent (base rentals) and bonus rentals and reimbursements from tenants for their pro-rata share of expenses such as common area maintenance costs, real estate taxes and utilities. We apply FASB ASC Topic 606, “Revenue from Contracts with Customers” with respect to tenant reimbursement and other property income, which totaled $3.0 million and $2.7 million for the three months ended September 30, 2018 and 2017, respectively, and $8.5 million and $7.6 million for the nine months ended September 30, 2018 and 2017, respectively. The 2018 nine month tenant reimbursement and other property income amounts also include a $1.7 million early lease termination fee recorded during the second quarter of 2018. Tenant reimbursements for operating expenses are accrued as revenue and generally due monthly from tenants. Since payments with respect to tenant reimbursement income are generally due monthly, no contract assets or liabilities have been recognized. Revenue consisting of rental income from leasing arrangements are specifically excluded from FASB ASC Topic 606.

On January 1, 2018, we adopted ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments, which adds or clarifies guidance of the classification of certain cash receipts and payments in the statement of cash flows, and ASU 2016-18, Restricted Cash, which requires an entity to show the changes in total cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. We adopted these ASUs by applying a retrospective transition method.

In 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” which requires lessees to recognize assets and liabilities on their consolidated balance sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their consolidated statements of comprehensive income over the lease term. It will also require disclosures designed to give financial statement users information regarding amount, timing, and uncertainty of cash flows arising from leases. The FASB issued ASU 2018-11, "Leases (Topic 842) Targeted Improvements" in July 2018, which provides lessors with a practical expedient, by class of underlying assets, to not separate non-lease components from the related lease components, and, instead, to account for those components as a single lease component, if certain criteria are met. ASU 2016-02 is effective for us beginning January 1, 2019, with early adoption permitted. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the consolidated financial statements. ASU 2018-11 also provides a practical expedient that allows companies to use an optional transition method. Under the optional transition method, a cumulative adjustment to retained earnings during the period of adoption is recorded and prior periods would not require restatement. At this time, the primary impact is expected to be related to our ground leases, in which we serve as lessee. We are currently evaluating the impact of this guidance on our consolidated financial statements from both the lessee and lessor perspective.

On January 1, 2018, we adopted ASU 2014-09, Revenue From Contracts With Customers (“ASU 2014-09”), which outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted the standard on January 1, 2018, using the modified retrospective approach, which requires a cumulative-effect adjustment to equity as of the date of adoption. ASU 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 2014-09 specifically references contracts with customers, it may apply to certain other transactions such as the sale of real estate or equipment. The adoption of this standard did not have a significant impact on our consolidated financial statements and no cumulative adjustment was recorded upon adoption, as a substantial portion of our revenue consists of rental income from leasing arrangements, which is specifically excluded from ASU 2014-09.

Our revenues consist primarily of rentals received from tenants, which are comprised of minimum rent (base rentals) and bonus rentals and reimbursements from tenants for their pro-rata share of expenses such as common area maintenance costs, real estate taxes and utilities. We apply FASB ASC Topic 606, “Revenue from Contracts with Customers” with respect to tenant reimbursement and other property income, which totaled $3.0 million and $2.7 million for the three months ended September 30, 2018 and 2017, respectively, and $8.5 million and $7.6 million for the nine months ended September 30, 2018 and 2017, respectively. The 2018 nine month tenant reimbursement and other property income amounts also include a $1.7 million early lease termination fee recorded during the second quarter of 2018. Tenant reimbursements for operating expenses are accrued as revenue and generally due monthly from tenants. Since payments with respect to tenant reimbursement income are generally due monthly, no contract assets or liabilities have been recognized. Revenue consisting of rental income from leasing arrangements are specifically excluded from FASB ASC Topic 606.