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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Taxes [Abstract] |
Taxability Of Cash Distributions Table [Text Block] | For income tax purposes, dividends paid to holders of common stock primarily consist of ordinary income, return of capital, capital gains, qualified dividends and un-recaptured Section 1250 gains, or a combination thereof. For the years ended December 31, 2016, 2015 and 2014, dividends per share held for the entire year were estimated to be taxable as follows:
| 2016 |  | 2015 |  | 2014
| Amount | Percentage |  | Amount | Percentage |  | Amount | Percentage
Ordinary income | $ | 3.28 |  | 100 | % |  | $ | 3.07 |  | 99.7 | % |  | $ | 2.76 |  | 94.41 | %
Return of capital | — |  | — | % |  | — |  | — | % |  | 0.16 |  | 5.59 | %
Un-recaptured Section 1250 gain | — |  | — | % |  | 0.01 |  | 0.3 | % |  | — |  | — | %
| $ | 3.28 |  | 100.00 | % |  | $ | 3.08 |  | 100.00 | % |  | $ | 2.92 |  | 100.00 | %
Summary of Valuation Allowance [Table Text Block] | For the years ended December 31, 2016 and 2015, the components of MAA's deferred income tax assets and liabilities were as follows (dollars in thousands):
| December 31, 2016 |  | December 31, 2015
Deferred tax assets: |  |  |
Real estate asset basis differences | $ | 13,387 |  |  | $ | 25,627 |
Deferred revenue | — |  |  | 22 |
Deferred expenses | 12,481 |  |  | 14,106 |
Net operating loss carryforward | 32,585 |  |  | 28,493 |
Accrued liabilities | 102 |  |  | 3,951 |
| $ | 58,555 |  |  | $ | 72,199 |
Deferred tax liabilities: |  |  |
Real estate asset basis differences | $ | (311 | ) |  | $ | (145 | )
| $ | (311 | ) |  | $ | (145 | )
Net deferred tax assets, before valuation allowance | $ | 58,244 |  |  | $ | 72,054 |
Valuation allowance | (58,244 | ) |  | (72,054 | )
Net deferred tax assets, included in other assets | $ | — |  |  | $ | — |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | For the years ended December 31, 2016, 2015 and 2014, the reconciliation of income tax attributable to continuing operations for the TRSs computed at the U.S. statutory rate to the income tax provision was as follows (dollars in thousands):
| 2016 |  | 2015 |  | 2014
Tax expense at U.S. statutory rates on TRS income subject to tax | $ | 3,185 |  |  | $ | 2,506 |  |  | $ | 1,802 |
Effect of permanent differences and other | — |  |  | (730 | ) |  | (1,110 | )
Decrease in valuation allowance | (3,185 | ) |  | (1,776 | ) |  | (692 | )
TRS income tax provision | $ | — |  |  | $ | — |  |  | $ | — |

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- Definition Income Taxes [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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