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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Numerator: |  |  |
Net income attributable to Acadia | $ 15,631 |  | $ 28,925
Less: net income attributable to participating securities | (162) |  | (365)
Income from continuing operations net of income attributable to participating securities | $ 15,469 |  | $ 28,560
Denominator: |  |  |
Weighted average shares for basic earnings per share | 83,635,000 |  | 70,756,000
Effect of dilutive securities: |  |  |
Employee share options | 11,000 |  | 16,000
Convertible Preferred OP Units | 0 |  | 428,000
Denominator for diluted earnings per share | 83,646,000 |  | 71,200,000
Basic and diluted earnings per Common Share from continuing operations attributable to Acadia (in dollars per share) | $ 0.18 |  | $ 0.40
Series A Preferred Stock [Member] | Common Shares |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 25,067 |  |
Series C Preferred Stock [Member] |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Preferred OP Units (in shares) | 141,593 | 141,593 |
Series C Preferred Stock [Member] | Common Shares |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 471,035 | 403,054 |
Operating Partnership, as General Partner or Managing Member [Member] |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Preferred OP Units (in shares) | 3,363,351 | 3,357,760 |
Operating Partnership, as General Partner or Managing Member [Member] | Series A Preferred Stock [Member] |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Preferred OP Units (in shares) | 188 | 188 |
Operating Partnership, as General Partner or Managing Member [Member] | Series C Preferred Stock [Member] |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Preferred OP Units (in shares) | 141,593 | 141,593 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 65 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e2793-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=64863997&loc=SL5780132-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e2814-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e2740-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=64863997&loc=SL5780133-109256 + Details
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