Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the accounting policies described in the consolidated financial statements and related notes included in our annual report on Form 10-K for the year ended December 31, 2016 ("2016 Form 10-K") and should be read in conjunction with such consolidated financial statements and related notes. The 2016 year end consolidated balance sheet data included in this Form 10-Q filing was derived from the audited consolidated financial statements in our 2016 Form 10-K, but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The following notes to these interim consolidated financial statements highlight significant changes to the notes included in the December 31, 2016 audited consolidated financial statements included in our 2016 Form 10-K and present interim disclosures as required by the Securities and Exchange Commission. Use of Estimates In order to conform with GAAP, in preparation of our consolidated financial statements we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of September 30, 2017 and December 31, 2016, and the reported amounts of revenues and expenses for the three and nine months ended September 30, 2017 and 2016. Actual results could differ from those estimates. In our opinion, the accompanying unaudited interim consolidated financial statements reflect all adjustments necessary for a fair statement of our financial position as of September 30, 2017 and December 31, 2016, the results of our operations and comprehensive income for each of the three and nine months ended September 30, 2017 and 2016, and our cash flows for each of the nine months ended September 30, 2017 and 2016. All adjustments are of a normal recurring nature. Investment in Real Estate and Depreciation Effective January 1, 2017, we adopted Accounting Standards Update ("ASU") No. 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business" ("ASU 2017-01"). ASU 2017-01 clarifies the framework for determining whether an integrated set of assets and activities meets the definition of a business. The revised framework establishes a screen for determining whether an integrated set of assets and activities is a business and narrows the definition of a business, which is expected to result in fewer transactions being accounted for as business combinations. Acquisitions of integrated sets of assets and activities that do not meet the definition of a business are accounted for as asset acquisitions. We applied ASU 2017-01 prospectively. We anticipate that our acquisitions of real estate in the future will generally not meet the definition of a business combination and, accordingly; transaction costs which have historically been expensed will be capitalized as part of the basis of the real estate assets acquired. Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”). ASU 2014-09 requires entities to recognize revenue when they transfer promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 is effective for annual periods beginning after December 15, 2017. We will adopt the new standard effective January 1, 2018 and expect to utilize the modified retrospective approach upon adoption. While lease contracts with customers, which constitute a vast majority of our revenues, are a specific scope exception, certain of our revenue streams may be impacted by the new guidance, however we do not believe there will be a material financial statement impact or that our pattern of revenue recognition will be materially impacted by the adoption of ASU 2014-09. In February 2016, the Financial Accounting Standards Board (the "FASB") issued ASU No. 2016-02, "Leases" ("ASU 2016-02"), which amends the existing accounting standards for lease accounting and sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract. Under ASU 2016-02, lessees will be required to record a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term and a lease liability, which is a lessee’s right to use, or control the use of, a specified asset for the lease term. We are a lessee on certain ground and operating leases as disclosed in Note 14 to the consolidated financial statements in our 2016 Form 10-K. While we expect to record a right-of-use asset and lease liability upon adoption of this standard, we anticipate the impact will not be material to our overall financial condition and results of operations. We are the lessor on a significant number of leases, however, we believe that ASU 2016-02 will have minimal impact to our financial condition or results of operations as leases where we are the lessor will continue to be accounted for as operating leases. The most significant changes ASU 2016-02 will have to lessor accounting will be the requirement that lessors expense certain initial direct costs that are not incremental in negotiating a lease as incurred as well bifurcating lease generated revenue into lease and non-lease components. ASU 2016-02 requires the use of a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest period presented in the consolidated financial statements, with certain practical expedients available. If practical expedients are elected, we would not be required to reassess (1) whether an expired or existing contract meets the definition of a lease; (2) the lease classification for expired or existing leases; and (3) whether costs previously capitalized as initial direct costs would continue to be amortized. We are continuing the process of evaluating and quantifying the effect that ASU 2016-02 will have on our consolidated financial statements and related disclosures. We will adopt ASU 2016-02 on January 1, 2019 and anticipate electing the practical expedients. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” ("ASU 2016-15"). ASU 2016-15 addresses eight specific cash flow issues and intends to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. ASU 2016-15 is effective for annual periods beginning after December 15, 2017 with retrospective application required. We expect ASU 2016-15 to impact the presentation of our consolidated statement of cash flows and we will adopt ASU 2016-15 on January 1, 2018. In November 2016, the FASB issued ASU No. 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash" ("ASU 2016-18"). ASU 2016-18 requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash and restricted cash equivalents when reconciling the beginning- of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 is effective for annual periods beginning after December 15, 2017. We expect ASU 2016-18 to impact the presentation of our consolidated statement of cash flows and we will adopt ASU 2016-18 on January 1, 2018. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeting Improvements to Accounting for Hedging Activities” (“ASU 2017-12”). ASU 2017-12 is intended to better align financial reporting for hedging activities with the economic objectives of those activities. As a result of the transition guidance, cumulative ineffectiveness that has been previously recognized on cash flow and net investment hedges that are still outstanding and designated as of the date of adoption will be adjusted and removed from beginning retained earnings and placed in accumulated other comprehensive income. ASU 2017-12 is effective for annual periods beginning after December 15, 2018. We continue to assess all the potential impacts of ASU 2017-12, however, we do not expect the adoption to have a material impact on our financial condition or results of operations.

Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the accounting policies described in the consolidated financial statements and related notes included in our annual report on Form 10-K for the year ended December 31, 2016 ("2016 Form 10-K") and should be read in conjunction with such consolidated financial statements and related notes. The 2016 year end consolidated balance sheet data included in this Form 10-Q filing was derived from the audited consolidated financial statements in our 2016 Form 10-K, but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). The following notes to these interim consolidated financial statements highlight significant changes to the notes included in the December 31, 2016 audited consolidated financial statements included in our 2016 Form 10-K and present interim disclosures as required by the Securities and Exchange Commission.

Use of Estimates

In order to conform with GAAP, in preparation of our consolidated financial statements we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of September 30, 2017 and December 31, 2016, and the reported amounts of revenues and expenses for the three and nine months ended September 30, 2017 and 2016. Actual results could differ from those estimates. In our opinion, the accompanying unaudited interim consolidated financial statements reflect all adjustments necessary for a fair statement of our financial position as of September 30, 2017 and December 31, 2016, the results of our operations and comprehensive income for each of the three and nine months ended September 30, 2017 and 2016, and our cash flows for each of the nine months ended September 30, 2017 and 2016. All adjustments are of a normal recurring nature.

Investment in Real Estate and Depreciation

Effective January 1, 2017, we adopted Accounting Standards Update ("ASU") No. 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business" ("ASU 2017-01"). ASU 2017-01 clarifies the framework for determining whether an integrated set of assets and activities meets the definition of a business. The revised framework establishes a screen for determining whether an integrated set of assets and activities is a business and narrows the definition of a business, which is expected to result in fewer transactions being accounted for as business combinations. Acquisitions of integrated sets of assets and activities that do not meet the definition of a business are accounted for as asset acquisitions. We applied ASU 2017-01 prospectively. We anticipate that our acquisitions of real estate in the future will generally not meet the definition of a business combination and, accordingly; transaction costs which have historically been expensed will be capitalized as part of the basis of the real estate assets acquired.

Recent Accounting Pronouncements

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”). ASU 2014-09 requires entities to recognize revenue when they transfer promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 is effective for annual periods beginning after December 15, 2017. We will adopt the new standard effective January 1, 2018 and expect to utilize the modified retrospective approach upon adoption. While lease contracts with customers, which constitute a vast majority of our revenues, are a specific scope exception, certain of our revenue streams may be impacted by the new guidance, however we do not believe there will be a material financial statement impact or that our pattern of revenue recognition will be materially impacted by the adoption of ASU 2014-09.

In February 2016, the Financial Accounting Standards Board (the "FASB") issued ASU No. 2016-02, "Leases" ("ASU 2016-02"), which amends the existing accounting standards for lease accounting and sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract. Under ASU 2016-02, lessees will be required to record a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term and a lease liability, which is a lessee’s right to use, or control the use of, a specified asset for the lease term. We are a lessee on certain ground and operating leases as disclosed in Note 14 to the consolidated financial statements in our 2016 Form 10-K. While we expect to record a right-of-use asset and lease liability upon adoption of this standard, we anticipate the impact will not be material to our overall financial condition and results of operations. We are the lessor on a significant number of leases, however, we believe that ASU 2016-02 will have minimal impact to our financial condition or results of operations as leases where we are the lessor will continue to be accounted for as operating leases. The most significant changes ASU 2016-02 will have to lessor accounting will be the requirement that lessors expense certain initial direct costs that are not incremental in negotiating a lease as incurred as well bifurcating lease generated revenue into lease and non-lease components. ASU 2016-02 requires the use of a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest period presented in the consolidated financial statements, with certain practical expedients available. If practical expedients are elected, we would not be required to reassess (1) whether an expired or existing contract meets the definition of a lease; (2) the lease classification for expired or existing leases; and (3) whether costs previously capitalized as initial direct costs would continue to be amortized. We are continuing the process of evaluating and quantifying the effect that ASU 2016-02 will have on our consolidated financial statements and related disclosures. We will adopt ASU 2016-02 on January 1, 2019 and anticipate electing the practical expedients.

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” ("ASU 2016-15"). ASU 2016-15 addresses eight specific cash flow issues and intends to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. ASU 2016-15 is effective for annual periods beginning after December 15, 2017 with retrospective application required. We expect ASU 2016-15 to impact the presentation of our consolidated statement of cash flows and we will adopt ASU 2016-15 on January 1, 2018.

In November 2016, the FASB issued ASU No. 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash" ("ASU 2016-18"). ASU 2016-18 requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash and restricted cash equivalents when reconciling the beginning- of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 is effective for annual periods beginning after December 15, 2017. We expect ASU 2016-18 to impact the presentation of our consolidated statement of cash flows and we will adopt ASU 2016-18 on January 1, 2018.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeting Improvements to Accounting for Hedging Activities” (“ASU 2017-12”). ASU 2017-12 is intended to better align financial reporting for hedging activities with the economic objectives of those activities. As a result of the transition guidance, cumulative ineffectiveness that has been previously recognized on cash flow and net investment hedges that are still outstanding and designated as of the date of adoption will be adjusted and removed from beginning retained earnings and placed in accumulated other comprehensive income. ASU 2017-12 is effective for annual periods beginning after December 15, 2018. We continue to assess all the potential impacts of ASU 2017-12, however, we do not expect the adoption to have a material impact on our financial condition or results of operations.