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Real Estate Investments Business Acquisitions, Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Business Acquisition, Pro Forma Information [Line Items] |  |  |  |
Document Fiscal Year Focus |  |  | 2016 |
Business Acquisition, Pro Forma Revenue | $ 155,285 | $ 146,091 | $ 309,794 | $ 291,365
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax | 42,290 | 33,718 | 84,210 | 63,545
Business Acquisition, Pro Forma Net Income (Loss) | $ 37,004 | $ 33,575 | $ 86,093 | $ 58,388
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ 0.0037 | $ 0.0035 | $ 0.0087 | $ 0.0061
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ 0.0037 | $ 0.0035 | $ 0.0086 | $ 0.0061
Market Common Clarendon [Member] |  |  |  |
Business Acquisition, Pro Forma Information [Line Items] |  |  |  |
Business Combination, Transaction Costs | $ 1,100 |  | $ 1,400 |
Business Combination, Pro Forma Information, Expenses of Acquiree since Acquisition Date, Actual | 1,299 |  | 1,619 |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual | $ 2,287 |  | $ 2,287 |

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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