Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The summary of significant accounting policies presented below is designed to assist in understanding our condensed consolidated financial statements. Such condensed consolidated financial statements and the accompanying notes are the representations of our management, who are responsible for their integrity and objectivity. These accounting policies conform to accounting principles generally accepted in the United States of America (“GAAP”), in all material respects, and have been consistently applied in preparing our accompanying condensed consolidated financial statements. Basis of Presentation Our accompanying condensed consolidated financial statements include our accounts and those of our subsidiaries and any consolidated variable interest entities (“VIEs”). All inter-company balances and transactions have been eliminated in the accompanying condensed consolidated financial statements. Interim Unaudited Financial Data Our accompanying condensed consolidated financial statements have been prepared by us in accordance with GAAP in conjunction with the rules and regulations of the SEC. Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, our accompanying condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. Our accompanying condensed consolidated financial statements reflect all adjustments, which are, in our opinion, of a normal recurring nature and necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods. Interim results of operations are not necessarily indicative of the results to be expected for the full year; such results may be less favorable for the full year. Our accompanying condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and the notes thereto included in our 2013 Annual Report on Form 10-K. Variable Interest Entities As of September 30, 2014, our condensed consolidated financial statements include four VIEs, which we were deemed to be the primary beneficiary. All of the VIEs were established during the third quarter of 2014 to facilitate potential Section 1031 Exchanges. The impact of consolidating the VIEs increased our total real estate assets by $72.2 million, but had no impact on our total assets. Real Estate Investments Depreciation expense of buildings and improvements for the three months ended September 30, 2014 and 2013 was $22.6 million and $18.9 million, respectively. Depreciation expense of buildings and improvements for the nine months ended September 30, 2014 and 2013 was $65.0 million and $55.6 million, respectively. Noncontrolling Interests HTA’s net income attributable to noncontrolling interests in the accompanying condensed consolidated statements of operations relate to both noncontrolling interest reflected within equity and redeemable noncontrolling interest of limited partners reflected outside of equity in the accompanying condensed consolidated balance sheets. Limited partner units, including LTIP awards, are accounted for as partners’ capital in HTALP’s accompanying condensed consolidated balance sheets and as noncontrolling interest reflected within equity or redeemable noncontrolling interest of limited partners reflected outside of equity in HTA’s accompanying condensed consolidated balance sheets. Redeemable noncontrolling interests relate to the interests in our consolidated entities that are not wholly owned by us. As these redeemable noncontrolling interests provide for redemption features not solely within our control, we classify such interests outside of permanent equity or partners’ capital. Recently Issued or Adopted Accounting Pronouncements In April 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Updated (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360) which changes the requirements for reporting discontinued operations. ASU 2014-08 changes the threshold for disclosing discontinued operations and the related disclosure requirements. Pursuant to ASU 2014-08, only disposals representing a strategic shift, such as a major line of business, a major geographical area or majority equity investment, should be presented as a discontinued operation. If the disposal does qualify as a discontinued operation under ASU 2014-08, the entity will be required to provide expanded disclosures. The guidance will be applied prospectively to new disposals and new classifications of disposal groups held for sale after the effective date. ASU 2014-08 is effective for annual periods beginning on or after December 15, 2014 with early adoption permitted but only for disposals or classifications as held for sale which have not been reported in financial statements previously issued or available for issuance. We adopted ASU 2014-08 as of January 1, 2014 and believe future sales of our individual operating properties will no longer qualify as discontinued operations. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration (i.e., payment) to which the company expects to be entitled in exchange for those goods or services. In adopting ASU 2014-09, companies may use either a full retrospective or a modified retrospective approach. ASU 2014-09 is effective for the first interim period within annual reporting periods beginning after December 15, 2016, and early adoption is not permitted. We are still evaluating the impact of adopting ASU 2014-09 on our financial statements. In June 2014, the FASB issued ASU 2014-12, Compensation - Stock Compensation (Topic 718). ASU 2014-12 requires that a performance target requisite service period be treated as a performance condition and, as a result, this type of performance condition may delay expense recognition until achievement of the performance target is probable. ASU 2014-12 is effective for reporting periods beginning after December 15, 2015, and early adoption is permitted. We will adopt ASU 2014-12 effective January 1, 2016 and it is not anticipated to have a material impact on our financial statements.

Summary of Significant Accounting Policies

The summary of significant accounting policies presented below is designed to assist in understanding our condensed consolidated financial statements. Such condensed consolidated financial statements and the accompanying notes are the representations of our management, who are responsible for their integrity and objectivity. These accounting policies conform to accounting principles generally accepted in the United States of America (“GAAP”), in all material respects, and have been consistently applied in preparing our accompanying condensed consolidated financial statements.

Basis of Presentation

Our accompanying condensed consolidated financial statements include our accounts and those of our subsidiaries and any consolidated variable interest entities (“VIEs”). All inter-company balances and transactions have been eliminated in the accompanying condensed consolidated financial statements.

Interim Unaudited Financial Data

Our accompanying condensed consolidated financial statements have been prepared by us in accordance with GAAP in conjunction with the rules and regulations of the SEC. Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, our accompanying condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. Our accompanying condensed consolidated financial statements reflect all adjustments, which are, in our opinion, of a normal recurring nature and necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods. Interim results of operations are not necessarily indicative of the results to be expected for the full year; such results may be less favorable for the full year. Our accompanying condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and the notes thereto included in our 2013 Annual Report on Form 10-K.

Variable Interest Entities

As of September 30, 2014, our condensed consolidated financial statements include four VIEs, which we were deemed to be the primary beneficiary. All of the VIEs were established during the third quarter of 2014 to facilitate potential Section 1031 Exchanges. The impact of consolidating the VIEs increased our total real estate assets by $72.2 million, but had no impact on our total assets.

Real Estate Investments

Depreciation expense of buildings and improvements for the three months ended September 30, 2014 and 2013 was $22.6 million and $18.9 million, respectively. Depreciation expense of buildings and improvements for the nine months ended September 30, 2014 and 2013 was $65.0 million and $55.6 million, respectively.

Noncontrolling Interests

HTA’s net income attributable to noncontrolling interests in the accompanying condensed consolidated statements of operations relate to both noncontrolling interest reflected within equity and redeemable noncontrolling interest of limited partners reflected outside of equity in the accompanying condensed consolidated balance sheets. Limited partner units, including LTIP awards, are accounted for as partners’ capital in HTALP’s accompanying condensed consolidated balance sheets and as noncontrolling interest reflected within equity or redeemable noncontrolling interest of limited partners reflected outside of equity in HTA’s accompanying condensed consolidated balance sheets.

Redeemable noncontrolling interests relate to the interests in our consolidated entities that are not wholly owned by us. As these redeemable noncontrolling interests provide for redemption features not solely within our control, we classify such interests outside of permanent equity or partners’ capital.

Recently Issued or Adopted Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Updated (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360) which changes the requirements for reporting discontinued operations. ASU 2014-08 changes the threshold for disclosing discontinued operations and the related disclosure requirements. Pursuant to ASU 2014-08, only disposals representing a strategic shift, such as a major line of business, a major geographical area or majority equity investment, should be presented as a discontinued operation. If the disposal does qualify as a discontinued operation under ASU 2014-08, the entity will be required to provide expanded disclosures. The guidance will be applied prospectively to new disposals and new classifications of disposal groups held for sale after the effective date. ASU 2014-08 is effective for annual periods beginning on or after December 15, 2014 with early adoption permitted but only for disposals or classifications as held for sale which have not been reported in financial statements previously issued or available for issuance. We adopted ASU 2014-08 as of January 1, 2014 and believe future sales of our individual operating properties will no longer qualify as discontinued operations.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration (i.e., payment) to which the company expects to be entitled in exchange for those goods or services. In adopting ASU 2014-09, companies may use either a full retrospective or a modified retrospective approach. ASU 2014-09 is effective for the first interim period within annual reporting periods beginning after December 15, 2016, and early adoption is not permitted. We are still evaluating the impact of adopting ASU 2014-09 on our financial statements.

In June 2014, the FASB issued ASU 2014-12, Compensation - Stock Compensation (Topic 718). ASU 2014-12 requires that a performance target requisite service period be treated as a performance condition and, as a result, this type of performance condition may delay expense recognition until achievement of the performance target is probable. ASU 2014-12 is effective for reporting periods beginning after December 15, 2015, and early adoption is permitted. We will adopt ASU 2014-12 effective January 1, 2016 and it is not anticipated to have a material impact on our financial statements.