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Earnings Per Share and Per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Earnings per Common Share and Per Unit - basic: [Abstract] |  |  |  |  |
Income from continuing operations |  | $ 33,840 | $ 27,352 | $ 95,510 | $ 66,493
Net (income) attributable to noncontrolling interests in the Operating Partnership from continuing operations |  | (926) | (790) | (2,611) | (1,907)
Net (income) attributable to noncontrolling interests in consolidated affiliates from continuing operations |  | (319) | (324) | (941) | (948)
Dividends on Preferred Stock |  | (624) | (626) | (1,877) | (1,879)
Income from continuing operations available for common stockholders |  | 31,971 | 25,612 | 90,081 | 61,759
Income from discontinued operations |  | 0 | 4,265 | 418,593 | 12,850
Net (income) attributable to noncontrolling interests in the Operating Partnership from discontinued operations |  | 0 | (128) | (12,265) | (389)
Income from discontinued operations available for common stockholders |  | 0 | 4,137 | 406,328 | 12,461
Net income available for common stockholders |  | $ 31,971 | $ 29,749 | $ 496,409 | $ 74,220
Denominator: |  |  |  |  |
Denominator for basic earnings per Common Share - weighted average shares (in shares) |  | 98,973 | 94,693 | 97,669 | 93,996
Earnings per Common Share - basic: |  |  |  |  |
Income from continuing operations available for common stockholders (in dollars per share) |  | $ 0.32 | $ 0.27 | $ 0.92 | $ 0.66
Income from discontinued operations available for common stockholders (in dollars per share) |  | 0.00 | 0.04 | 4.16 | 0.13
Net income available for common stockholders (in dollars per share) |  | $ 0.32 | $ 0.31 | $ 5.08 | $ 0.79
Earnings per Common Share and Per Unit - diluted: [Abstract] |  |  |  |  |
Income from continuing operations |  | $ 33,840 | $ 27,352 | $ 95,510 | $ 66,493
Net (income) attributable to noncontrolling interests in consolidated affiliates |  | (319) | (324) | (941) | (948)
Dividends on Preferred Stock |  | (624) | (626) | (1,877) | (1,879)
Income from continuing operations available for common stockholders before net (income) attributable to noncontrolling interests in the Operating Partnership |  | 32,897 | 26,402 | 92,692 | 63,666
Income from discontinued operations available for common stockholders |  | 0 | 4,265 | 418,593 | 12,850
Net income available for common stockholders before net (income) attributable to noncontrolling interests in the Operating Partnership |  | $ 32,897 | $ 30,667 | $ 511,285 | $ 76,516
Denominator: |  |  |  |  |
Denominator for basic earnings per Common Share - weighted average shares (in shares) |  | 98,973 | 94,693 | 97,669 | 93,996
Stock options using the treasury method (in shares) |  | 108 | 58 | 94 | 89
Noncontrolling interests Common Units (in shares) |  | 2,858 | 2,910 | 2,882 | 2,918
Denominator for diluted earnings per Common Share - adjusted weighted average shares and assumed conversions (in shares) | [1] | 101,939 | 97,661 | 100,645 | 97,003
Earnings per Common Share - diluted: |  |  |  |  |
Income from continuing operations available for common stockholders (in dollars per share) |  | $ 0.32 | $ 0.27 | $ 0.92 | $ 0.66
Income from discontinued operations available for common stockholders (in dollars per share) |  | 0.00 | 0.04 | 4.16 | 0.13
Net income available for common stockholders (in dollars per share) |  | $ 0.32 | $ 0.31 | $ 5.08 | $ 0.79
Highwoods Realty Limited Partnership [Member] |  |  |  |  |
Earnings per Common Share and Per Unit - basic: [Abstract] |  |  |  |  |
Income from continuing operations |  | $ 33,840 | $ 27,352 | $ 95,510 | $ 66,493
Net (income) attributable to noncontrolling interests in consolidated affiliates from continuing operations |  | (319) | (324) | (941) | (948)
Distributions on Preferred Units |  | (624) | (626) | (1,877) | (1,879)
Income from continuing operations available for common unitholders |  | 32,897 | 26,402 | 92,692 | 63,666
Income from discontinued operations available for common unitholders |  | 0 | 4,265 | 418,593 | 12,850
Net income available for common unitholders |  | $ 32,897 | $ 30,667 | $ 511,285 | $ 76,516
Denominator: |  |  |  |  |
Denominator for basic earnings per Common Unit - weighted average units (in shares) |  | 101,422 | 97,194 | 100,142 | 96,505
Earnings per Common Unit - basic: |  |  |  |  |
Income from continuing operations available for common unitholders (in dollars per share) |  | $ 0.32 | $ 0.27 | $ 0.93 | $ 0.66
Income from discontinued operations available for common unitholders (in dollars per share) |  | 0.00 | 0.05 | 4.18 | 0.13
Net income available for common unitholders (in dollars per share) |  | $ 0.32 | $ 0.32 | $ 5.11 | $ 0.79
Earnings per Common Share and Per Unit - diluted: [Abstract] |  |  |  |  |
Income from continuing operations |  | $ 33,840 | $ 27,352 | $ 95,510 | $ 66,493
Net (income) attributable to noncontrolling interests in consolidated affiliates |  | (319) | (324) | (941) | (948)
Distributions on Preferred Units |  | (624) | (626) | (1,877) | (1,879)
Income from continuing operations available for common unitholders |  | 32,897 | 26,402 | 92,692 | 63,666
Income from discontinued operations available for common unitholders |  | 0 | 4,265 | 418,593 | 12,850
Net income available for common unitholders |  | $ 32,897 | $ 30,667 | $ 511,285 | $ 76,516
Denominator: |  |  |  |  |
Denominator for basic earnings per Common Unit - weighted average units (in shares) |  | 101,422 | 97,194 | 100,142 | 96,505
Stock options using the treasury method (in shares) |  | 108 | 58 | 94 | 89
Denominator for diluted earnings per Common Unit - adjusted weighted average units and assumed conversions (in shares) | [2] | 101,530 | 97,252 | 100,236 | 96,594
Earnings per Common Unit - diluted: |  |  |  |  |
Income from continuing operations available for common unitholders (in dollars per share) |  | $ 0.32 | $ 0.27 | $ 0.92 | $ 0.66
Income from discontinued operations available for common unitholders (in dollars per share) |  | 0.00 | 0.05 | 4.18 | 0.13
Net income available for common unitholders (in dollars per share) |  | $ 0.32 | $ 0.32 | $ 5.10 | $ 0.79
[1] | Includes all unvested restricted stock where dividends on such restricted stock are non-forfeitable.
[2] | Includes all unvested restricted stock where dividends on such restricted stock are non-forfeitable.

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- Definition The amount of net income (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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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