Earnings (Loss) Per Share - Schedule of Computation of Loss Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]                      
Net income (loss) attributable to common stockholders $ (2,451) $ 16,862 $ (17,109) $ (7,594) $ (1,700) $ 14,525 $ (1,952) $ (1,216) $ (10,292) $ 9,657 $ 12,435
Basic weighted average shares outstanding 13,810,587 13,802,212 13,799,501 13,789,426 13,786,308 11,562,465 9,759,758 9,727,127 13,800,494 11,221,005 6,981,027
Dilutive effect of stock-based awards                 0 53,419  
Dilutive effect of Series A Preferred Stock                 0 560,082 0
Dilutive weighted average shares outstanding 13,810,587 13,817,050 13,799,501 13,789,426 13,786,308 13,813,514 9,759,758 9,727,127 13,800,494 11,834,506 6,981,027
Basic earnings (loss) per share $ (0.18) $ 1.22 $ (1.24) $ (0.55) $ (0.12) $ 1.26 $ (0.20) $ (0.13) $ (0.75) $ 0.86 $ 1.78
Diluted earnings (loss) per share $ (0.18) $ 1.22 $ (1.24) $ (0.55) $ (0.12) $ 1.05 $ (0.20) $ (0.13) $ (0.75) $ 0.82 $ 1.78
Antidilutive common stock equivalents excluded from diluted earnings (loss) per share                 18,169 16,458 158,557