Organization and Description of Business	9 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business HTA, a Maryland corporation, and HTALP, a Delaware limited partnership, were incorporated or formed, as applicable, on April 20, 2006. HTA operates as a REIT and is the general partner of HTALP, which is the operating partnership. As of September 30, 2017, HTA owned a 98.0% partnership interest and other limited partners, including some of our directors, executive officers and their affiliates, owned the remaining partnership interest (including the LTIP Units) in HTALP. As the sole general partner of HTALP, HTA has the full, exclusive and complete responsibility for HTALP’s day-to-day management and control. HTA operates in an umbrella partnership REIT structure in which HTALP and its subsidiaries hold substantially all of the assets. HTA’s only material asset is its ownership of partnership interests of HTALP. As a result, HTA does not conduct business itself, other than acting as the sole general partner of HTALP, issuing public equity from time to time and guaranteeing certain debts of HTALP. HTALP conducts the operations of the business and issues publicly-traded debt, but has no publicly-traded equity. HTA is the largest publicly-traded REIT focused on medical office buildings (“MOBs”) in the U.S. as measured by the gross leasable area (“GLA”) of our MOBs. HTA conducts substantially all of its operations through HTALP. We invest in MOBs that we believe will serve the future of healthcare delivery, and MOBs that are primarily located on health system campuses, near university medical centers, or in core community outpatient locations. We also focus on our key markets that have certain demographic and macro-economic trends and where we can utilize our institutional property management and leasing platform to generate strong tenant relationships and operating cost efficiencies. Our primary objective is to maximize stockholder value with disciplined growth through strategic investments that provide an attractive risk-adjusted return for our stockholders by consistently increasing our cash flow. In pursuing this objective, we: (i) seek internal growth through proactive asset management, leasing and property management oversight; (ii) target accretive acquisitions and developments of MOBs in markets with attractive demographics that complement our existing portfolio; and (iii) actively manage our balance sheet to maintain flexibility with conservative leverage. Additionally, from time to time we consider, on an opportunistic basis, significant portfolio acquisitions that we believe fit our core business and could enhance our existing portfolio. HTA has qualified to be taxed as a REIT for federal income tax purposes and intends to continue to be taxed as a REIT. Since 2006, we have invested $7.0 billion to create a portfolio of MOBs and other healthcare assets consisting of approximately 24.2 million square feet of GLA throughout the U.S. As of September 30, 2017, our portfolio included $2.24 billion of investments, net of development credits received at closing, in connection with our acquisition of the Duke MOB business (the “Duke Acquisition”), which includes a 50% ownership interest in an unconsolidated joint venture for $68.8 million as of the date of acquisition. Our only remaining obligations related to the Duke Acquisition are the potential acquisition of a land parcel in Miami, FL and a single property in Texas that are each currently excluded from our purchase obligations due to current outstanding physical condition issues. As of September 30, 2017, approximately 96% of our portfolio, based on GLA, was located on the campuses of, or aligned with, nationally or regionally recognized healthcare systems. Our portfolio is diversified geographically across 33 states, with no state having more than 19% of our total GLA as of September 30, 2017. We are concentrated in 20 to 25 key markets that are experiencing higher economic and demographic trends than other markets, on average, that we expect will drive demand for MOBs. Approximately 92% of our portfolio, based on GLA, is located in the top 75 metropolitan statistical areas (“MSAs”) with Atlanta, Boston, Dallas, Houston and Tampa being our largest markets by investment. Our principal executive office is located at 16435 North Scottsdale Road, Suite 320, Scottsdale, Arizona, 85254.

Organization and Description of Business

HTA, a Maryland corporation, and HTALP, a Delaware limited partnership, were incorporated or formed, as applicable, on April 20, 2006. HTA operates as a REIT and is the general partner of HTALP, which is the operating partnership. As of September 30, 2017, HTA owned a 98.0% partnership interest and other limited partners, including some of our directors, executive officers and their affiliates, owned the remaining partnership interest (including the LTIP Units) in HTALP. As the sole general partner of HTALP, HTA has the full, exclusive and complete responsibility for HTALP’s day-to-day management and control. HTA operates in an umbrella partnership REIT structure in which HTALP and its subsidiaries hold substantially all of the assets. HTA’s only material asset is its ownership of partnership interests of HTALP. As a result, HTA does not conduct business itself, other than acting as the sole general partner of HTALP, issuing public equity from time to time and guaranteeing certain debts of HTALP. HTALP conducts the operations of the business and issues publicly-traded debt, but has no publicly-traded equity.

HTA is the largest publicly-traded REIT focused on medical office buildings (“MOBs”) in the U.S. as measured by the gross leasable area (“GLA”) of our MOBs. HTA conducts substantially all of its operations through HTALP. We invest in MOBs that we believe will serve the future of healthcare delivery, and MOBs that are primarily located on health system campuses, near university medical centers, or in core community outpatient locations. We also focus on our key markets that have certain demographic and macro-economic trends and where we can utilize our institutional property management and leasing platform to generate strong tenant relationships and operating cost efficiencies. Our primary objective is to maximize stockholder value with disciplined growth through strategic investments that provide an attractive risk-adjusted return for our stockholders by consistently increasing our cash flow. In pursuing this objective, we: (i) seek internal growth through proactive asset management, leasing and property management oversight; (ii) target accretive acquisitions and developments of MOBs in markets with attractive demographics that complement our existing portfolio; and (iii) actively manage our balance sheet to maintain flexibility with conservative leverage. Additionally, from time to time we consider, on an opportunistic basis, significant portfolio acquisitions that we believe fit our core business and could enhance our existing portfolio. HTA has qualified to be taxed as a REIT for federal income tax purposes and intends to continue to be taxed as a REIT.

Since 2006, we have invested $7.0 billion to create a portfolio of MOBs and other healthcare assets consisting of approximately 24.2 million square feet of GLA throughout the U.S. As of September 30, 2017, our portfolio included $2.24 billion of investments, net of development credits received at closing, in connection with our acquisition of the Duke MOB business (the “Duke Acquisition”), which includes a 50% ownership interest in an unconsolidated joint venture for $68.8 million as of the date of acquisition. Our only remaining obligations related to the Duke Acquisition are the potential acquisition of a land parcel in Miami, FL and a single property in Texas that are each currently excluded from our purchase obligations due to current outstanding physical condition issues.

As of September 30, 2017, approximately 96% of our portfolio, based on GLA, was located on the campuses of, or aligned with, nationally or regionally recognized healthcare systems. Our portfolio is diversified geographically across 33 states, with no state having more than 19% of our total GLA as of September 30, 2017. We are concentrated in 20 to 25 key markets that are experiencing higher economic and demographic trends than other markets, on average, that we expect will drive demand for MOBs. Approximately 92% of our portfolio, based on GLA, is located in the top 75 metropolitan statistical areas (“MSAs”) with Atlanta, Boston, Dallas, Houston and Tampa being our largest markets by investment.

Our principal executive office is located at 16435 North Scottsdale Road, Suite 320, Scottsdale, Arizona, 85254.