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Acquisitions and Divestitures Business Acquisition, Pro-Forma Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2013
USD ($)
$ / shares
Business Combinations, Pro-Forma Information [Abstract]  
Total revenues $ 457,811
Net loss attributable to common shareholders $ (148,272)
Loss per share – basic and diluted | $ / shares $ (2.27)