Quarterly report pursuant to Section 13 or 15(d)

Earnings/ (Loss) Per Share - Schedule of Calculation of Basic and Diluted Earnings (Loss) Per Common Share (Details)

v3.7.0.1
Earnings/ (Loss) Per Share - Schedule of Calculation of Basic and Diluted Earnings (Loss) Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share, Basic and Diluted [Abstract]        
Net income (loss) $ 33,315 $ (120,922) $ 57,614 $ (311,431)
Less portion allocated to nonvested shares 1,374   2,442  
Net income (loss) allocated to common shares $ 31,941 $ (120,922) $ 55,172 $ (311,431)
Weighted average common shares outstanding 137,552 76,457 137,533 76,443
Basic and diluted earnings (loss) per common share $ 0.23 $ (1.58) $ 0.40 $ (4.07)
Shares excluded due to being anti-dilutive (weighted-average)   3,531   3,529