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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Numerator: |  |  |  |
Net income attributable to Acadia | $ 7,665 | $ 12,060 | $ 15,084 | $ 27,691
Less: net income attributable to participating securities | (47) | (126) | (91) | (372)
Income from continuing operations net of income attributable to participating securities | $ 7,618 | $ 11,934 | $ 14,993 | $ 27,319
Denominator: |  |  |  |
Weighted average shares for basic earnings per share (in shares) | 81,755,702 | 83,661,953 | 82,590,256 | 83,648,415
Effect of dilutive securities: |  |  |  |
Employee unvested restricted shares (in shares) | 0 | 0 | 1,968 | 5,365
Denominator for diluted earnings per share (in shares) | 81,755,702 | 83,661,953 | 82,592,224 | 83,653,780
Basic and diluted earnings per share (in dollars per share) | $ 0.09 | $ 0.14 | $ 0.18 | $ 0.33
Series A Preferred OP Units |  |  |  |
Anti-Dilutive Shares Excluded from Denominator: |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 188 | 188 | 188 | 188
Series A Preferred OP Units - Common share equivalent |  |  |  |
Anti-Dilutive Shares Excluded from Denominator: |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 25,067 | 25,067 | 25,067 | 25,067
Series C Preferred OP Units |  |  |  |
Anti-Dilutive Shares Excluded from Denominator: |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 136,593 | 140,343 | 136,593 | 140,343
Series C Preferred OP Units - Common share equivalent |  |  |  |
Anti-Dilutive Shares Excluded from Denominator: |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 474,278 | 487,299 | 474,278 | 479,167
Restricted shares |  |  |  |
Anti-Dilutive Shares Excluded from Denominator: |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 38,831 | 43,318 | 0 | 0

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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://fasb.org/us-gaap/role/ref/legacyRef -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 amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1337-109256 + Details
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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4613673-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=109260490&loc=SL5780132-109256 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e2814-109256 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=109260490&loc=SL5780133-109256 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 65 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e2793-109256 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e2740-109256 + Details
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