| Cover Page - USD ($) | 12 Months Ended | | |
| Dec. 31, 2021 | Feb. 22, 2022 | Jun. 30, 2021 |
| Entity Information [Line Items] | | | |
| Document Type | 10-K/A | | |
| Document Annual Report | true | | |
| Document Period End Date | Dec. 31,
2021 | | |
| Current Fiscal Year End Date | --12-31 | | |
| Document Transition Report | false | | |
| Entity File Number | 001-35568 | | |
| Entity Registrant Name | HEALTHCARE TRUST OF AMERICA, INC. | | |
| Entity Incorporation, State or Country Code | MD | | |
| Entity Tax Identification Number | 20-4738467 | | |
| Entity Address, Address Line One | 16435 N. Scottsdale Road, Suite 320, | | |
| Entity Address, City or Town | Scottsdale, | | |
| Entity Address, State or Province | AZ | | |
| Entity Address, Postal Zip Code | 85254 | | |
| City Area Code | (480) | | |
| Local Phone Number | 998-3478 | | |
| Title of 12(b) Security | Common stock, $0.01 par value | | |
| Trading Symbol | HTA | | |
| Security Exchange Name | NYSE | | |
| Entity Well-known Seasoned Issuer | Yes | | |
| Entity Voluntary Filers | No | | |
| Entity Current Reporting Status | Yes | | |
| Entity Interactive Data Current | Yes | | |
| Entity Filer Category | Large Accelerated Filer | | |
| Entity Small business | false | | |
| Entity Emerging Growth Company | false | | |
| ICFR Auditor Attestation Flag | true | | |
| Entity Shell Company | false | | |
| Entity Public Float | | | $ 5,816,445,106 |
| Entity Common Stock, Shares Outstanding | | 229,026,869 | |
| Entity Central Index Key | 0001360604 | | |
| Amendment Flag | true | | |
| Document Fiscal Year Focus | 2021 | | |
| Document Fiscal Period Focus | FY | | |
| Documents Incorporated by Reference | None | | |
| Amendment Description | This Amendment No. 1 on Form 10-K (this “Amendment No. 1” or “Form 10-K/A”) is being filed to amend the Annual Report on Form 10-K of of Healthcare Trust of America, Inc. (“HTA”), a Maryland corporation, and Healthcare Trust of America Holdings, LP (“HTALP”), a Delaware limited partnership for the year ended December 31, 2021, filed with the Securities and Exchange Commission (the “SEC”) on March 1, 2022 (the “Original 10-K”). We are filing this Amendment No. 1 solely for the purpose of including the information required by Part III (Items 10, 11, 12, 13 and 14) of Form 10-K. This information was previously omitted from the Original 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference from our definitive proxy statement if such statement is filed no later than 120 days after our fiscal year-end. We are filing this Amendment No. 1 to include Part III information in our Form 10-K because we will not file a definitive proxy statement containing such information within 120 days after the end of the fiscal year covered by the Original 10-K. The reference on the cover of the Original Filing to the incorporation by reference to portions of our definitive proxy statement into Part III of the Original 10-K is hereby deleted.Part III (Items 10, 11, 12, 13 and 14) of the Original 10-K is hereby deleted in its entirety and replaced with the following Part III set forth below, and Item 15 of Part IV of the Original 10-K is being amended to add new exhibits, including certifications. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), this Form 10-K/A also contains certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are filed as exhibits hereto. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted.Except as described above, this Form 10-K/A does not modify or update disclosure in, or exhibits to, the Original 10-K.Furthermore, this Form 10-K/A does not change any previously-reported financial results. Information not affected by this Form 10-K/A remains unchanged and reflects the disclosures made at the time the Original 10-K was filed. | | |
| Healthcare Trust of America Holdings, LP (HTALP) | | | |
| Entity Information [Line Items] | | | |
| Current Fiscal Year End Date | --12-31 | | |
| Document Transition Report | false | | |
| Entity File Number | 333-190916 | | |
| Entity Registrant Name | HEALTHCARE TRUST OF AMERICA HOLDINGS, LP | | |
| Entity Incorporation, State or Country Code | DE | | |
| Entity Tax Identification Number | 20-4738347 | | |
| Entity Well-known Seasoned Issuer | Yes | | |
| Entity Voluntary Filers | No | | |
| Entity Current Reporting Status | Yes | | |
| Entity Interactive Data Current | Yes | | |
| Entity Filer Category | Non-accelerated Filer | | |
| Entity Small business | false | | |
| Entity Emerging Growth Company | false | | |
| ICFR Auditor Attestation Flag | true | | |
| Entity Shell Company | false | | |
| Entity Central Index Key | 0001495491 | | |
| Amendment Flag | true | | |
| Document Fiscal Year Focus | 2021 | | |
| Document Fiscal Period Focus | FY | | |
