Organization and Description of Business	12 Months Ended
Dec. 31, 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 December 31, 2017, HTA owned a 98.1% 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 MOBs in the U.S. as measured by the 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 full-service property management, leasing and development services platform to generate strong tenant and health system 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, building services 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, development projects and other healthcare assets consisting of approximately 24.1 million square feet of GLA throughout the U.S. As of December 31, 2017, 70% of our portfolio was located on the campuses of, or adjacent to, nationally and 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 December 31, 2017. We believe these key locations and affiliations create significant demand from healthcare related tenants for our properties. Further, our portfolio is primarily concentrated within major U.S. metropolitan statistical areas (“MSAs”) that we believe will provide above-average economic growth and socioeconomic benefits over the coming years. As of December 31, 2017, we had approximately 1 million square feet of GLA in each of our top ten markets and approximately 93% of our portfolio, based on GLA, is located in the top 75 MSAs, with Dallas, Houston, Boston, Tampa and Atlanta 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 December 31, 2017, HTA owned a 98.1% 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 MOBs in the U.S. as measured by the 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 full-service property management, leasing and development services platform to generate strong tenant and health system 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, building services 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, development projects and other healthcare assets consisting of approximately 24.1 million square feet of GLA throughout the U.S. As of December 31, 2017, 70% of our portfolio was located on the campuses of, or adjacent to, nationally and 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 December 31, 2017. We believe these key locations and affiliations create significant demand from healthcare related tenants for our properties. Further, our portfolio is primarily concentrated within major U.S. metropolitan statistical areas (“MSAs”) that we believe will provide above-average economic growth and socioeconomic benefits over the coming years. As of December 31, 2017, we had approximately 1 million square feet of GLA in each of our top ten markets and approximately 93% of our portfolio, based on GLA, is located in the top 75 MSAs, with Dallas, Houston, Boston, Tampa and Atlanta being our largest markets by investment.

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