Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) Per Share - EPS Reconciliation (Details)

v3.7.0.1
Net Income (Loss) Per Share - EPS Reconciliation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Earnings Per Share [Abstract]                      
Net income (loss) attributable to the Company's common stockholders - Basic                 $ 43,453 $ (151,392) $ 81,620
Plus: distributed dividends to Preferred Stockholders                 0 0 40
Plus (less): effect of participating securities                 874 0 (418)
Net income (loss) attributable to common stockholders                 44,327 (151,392) 81,242
Less: effect of participating securities                 (874) 0 0
Net income (loss) attributable to the Company's common stockholders - Diluted                 $ 43,453 $ (151,392) $ 81,242
Weighted-average shares outstanding - Basic (in shares)                 40,897,549 43,958,803 40,740,411
Adjustment to reflect stock appreciation right conversions (in shares)                 5,311 0 9,502
Weighted-average shares outstanding - Diluted (in shares)                 40,902,860 43,958,803 40,749,913
Net income (loss) per share attributable to common stockholders - Diluted (in dollars per share) $ 0.51 $ 0.59 $ 0.18 $ (0.14) $ (2.18) $ (0.36) $ (0.05) $ (0.86) $ 1.06 $ (3.44) $ 1.99