Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) Per Share (Details)

v3.10.0.1
Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Net income (loss) $ 42,700 $ (1,170) $ 98,246 $ (6,151)
Basic earnings (loss) per share:        
Weighted average common shares outstanding (in shares) 44,737,000 39,500,000 44,700,000 38,506,000
Basic earnings (loss) per share (in USD per share) $ 0.95 $ (0.03) $ 2.20 $ (0.16)
Diluted earnings (loss) per share:        
Weighted average common shares, including dilutive effect (in shares) 45,059,000 39,500,000 44,977,000 38,506,000
Diluted earnings (loss) per share (in USD per share) $ 0.95 $ (0.03) $ 2.18 $ (0.16)
Restricted Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)   0   0