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Earnings per Share and Unit (Tables) | 6 Months Ended
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Jun. 30, 2016
Parent Company [Member] |
Schedule of earnings per share | The following summarizes the calculation of basic and diluted earnings per share:
|  | Three months ended June 30, |  | Six months ended June 30,
(in thousands, except per share data) |  | 2016 |  | 2015 |  | 2016 |  | 2015
Numerator: |  |  |  |  |  |  |  |
Income from operations attributable to common stockholders - basic |  | $ | 34,810 |  |  | 32,480 |  |  | $ | 82,687 |  |  | 57,653 |
Income from operations attributable to common stockholders - diluted |  | $ | 34,810 |  |  | 32,480 |  |  | $ | 82,687 |  |  | 57,653 |
Denominator: |  |  |  |  |  |  |  |
Weighted average common shares outstanding for basic EPS |  | 97,657 |  |  | 94,136 |  |  | 97,588 |  |  | 94,036 |
Weighted average common shares outstanding for diluted EPS (1) |  | 98,218 |  |  | 94,503 |  |  | 98,075 |  |  | 94,392 |
Income per common share – basic |  | $ | 0.36 |  |  | 0.35 |  |  | $ | 0.85 |  |  | 0.61 |
Income per common share – diluted |  | $ | 0.35 |  |  | 0.34 |  |  | $ | 0.84 |  |  | 0.61 |
Partnership Interest [Member] |
Schedule of earnings per share | The following summarizes the calculation of basic and diluted earnings per unit:
|  | Three months ended June 30, |  | Six months ended June 30,
(in thousands, except per share data) |  | 2016 |  | 2015 |  | 2016 |  | 2015
Numerator: |  |  |  |  |  |  |  |
Income from operations attributable to common unit holders - basic |  | $ | 34,874 |  |  | 32,541 |  |  | $ | 82,837 |  |  | 57,763 |
Income from operations attributable to common unit holders - diluted |  | $ | 34,874 |  |  | 32,541 |  |  | $ | 82,837 |  |  | 57,763 |
Denominator: |  |  |  |  |  |  |  |
Weighted average common units outstanding for basic EPU |  | 97,811 |  |  | 94,290 |  |  | 97,742 |  |  | 94,190 |
Weighted average common units outstanding for diluted EPU (1) |  | 98,372 |  |  | 94,658 |  |  | 98,229 |  |  | 94,546 |
Income per common unit – basic |  | $ | 0.36 |  |  | 0.35 |  |  | $ | 0.85 |  |  | 0.61 |
Income per common unit – diluted |  | $ | 0.35 |  |  | 0.34 |  |  | $ | 0.84 |  |  | 0.61 |
(1) Includes the dilutive impact of unvested restricted stock and forward equity offering using the treasury stock method. Subsequent to June 30, 2016, the Parent Company issued 5.0 million shares of common stock pursuant to the Company's shelf registration statement. For details of the offering transaction, refer to Note 7.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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