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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2016
Accounting Policies [Abstract] |
Schedule of Construction in Progress | Construction in progress as of September 30, 2016 and December 31, 2015, is composed of the following:
(in thousands) |  | September 30, 2016 |  | December 31, 2015
Park Van Ness |  | $ | — |  |  | $ | 77,245 |
Glebe Road |  | 55,858 |  |  | — |
Other |  | 4,915 |  |  | 6,271 |
Total |  | $ | 60,773 |  |  | $ | 83,516 |
Basic and Diluted Shares Outstanding | The following table sets forth, for the indicated periods, weighted averages of the number of common shares outstanding, basic and dilutive, the effect of dilutive options and the number of options which are not dilutive because the average price of the Company's common stock was less than the exercise prices. The treasury stock method was used to measure the effect of the dilution.
| As of or for the three months ended September 30, |  | As of or for the nine months ended September 30,
(In thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Weighted average common stock outstanding-Basic | 21,597 |  |  | 21,158 |  |  | 21,448 |  |  | 21,091 |
Effect of dilutive options | 182 |  |  | 33 |  |  | 96 |  |  | 66 |
Weighted average common stock outstanding-Diluted | 21,779 |  |  | 21,191 |  |  | 21,544 |  |  | 21,157 |
Non-dilutive options | — |  |  | 298 |  |  | 172 |  |  | 124 |
Years non-dilutive options were issued |  |  | 2007 and 2015 |  | 2007, 2015, 2016 |  | 2007 and 2015

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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