Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Unaudited Pro Forma Financial Information) (Details)

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Acquisitions (Unaudited Pro Forma Financial Information) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Combinations [Abstract]        
Revenues $ 82,283 $ 48,534 $ 166,699 $ 91,149
Income (loss) from operations 23,743 (57,037) 58,650 (92,488)
Income (loss) available to common stockholders $ 31,566 $ (73,207) $ 79,529 $ (112,115)
Net income (loss) per common share:        
Basic (in dollars per share) $ 0.16 $ (0.46) $ 0.40 $ (0.80)
Diluted (in dollars per share) $ 0.16 $ (0.46) $ 0.40 $ (0.80)