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Acquisitions and Dispositions (Details 5) - 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 [Line Items]        
Revenue $ 72,239 $ 53,399 $ 139,493 $ 108,515
Net income 14,827 8,680 28,978 15,586
Net income available to common shareholders $ 14,020 $ 7,157 $ 26,968 $ 14,627
Earnings per share - basic $ 0.11 $ 0.05 $ 0.23 $ 0.12
Earnings per share - diluted $ 0.10 $ 0.05 $ 0.22 $ 0.12
Weighted average number of shares outstanding - basic 131,481,329 70,376,959 117,092,668 68,026,278
Weighted average number of shares outstanding - diluted 135,944,722 74,267,283 121,575,247 71,862,249