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ACQUISITIONS AND PRO FORMA RESULTS (Pro Forma Financial Information Summarization Results of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Business Combinations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenue from continuing operations, As reported | $ 255,664 | $ 250,332 | $ 249,309 | $ 236,770 | $ 241,160 | $ 226,367 | $ 212,673 | $ 202,534 | $ 992,075 | $ 882,734 | $ 796,717
Total revenue from continuing operations, Pro forma |  |  |  |  |  |  |  |  |  | 940,089 | 921,998
Net income from continuing operations, As reported | $ 28,246 | $ 20,144 | $ 12,755 | $ 13,419 | $ 14,980 | $ (31,881) | $ 12,020 | $ 11,732 | $ 74,564 | 6,851 | 36,295
Net income from continuing operations, Pro forma |  |  |  |  |  |  |  |  |  | $ 10,749 | $ 40,721
Net income from continuing operations per share: |  |  |  |  |  |  |  |  |  |  |
Basic net income per common share from continuing operations (in dollars per share) | $ 0.38 | $ 0.27 | $ 0.17 | $ 0.18 | $ 0.20 | $ (0.45) | $ 0.18 | $ 0.18 | $ 1.00 | $ 0.10 | $ 0.56
Basic, Pro forma (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.14 | $ 0.56

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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=65885119&loc=d3e1392-128463 + Details
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