Summary of Significant Accounting Policies - Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Basic net income (loss)	$ 11,897	$ 5,520	$ 130,049	$ (3,954)
Diluted net income (loss)	$ 13,098	$ 5,520	$ 133,649	$ (3,954)
Denominator:
Basic weighted average shares outstanding	22,415,780	22,018,449	22,402,799	22,006,460
Diluted weighted average shares outstanding	26,654,287	22,166,873	26,606,199	22,006,460
Basic income (loss) per share	$ 0.53	$ 0.25	$ 5.81	$ (0.18)
Diluted income (loss) per share	$ 0.49	$ 0.25	$ 5.02	$ (0.18)