Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator (basic)
Net income (loss)	$ (1,308)	$ 6,221	$ 14,503	$ 7,761
Less net income allocated to participating securities				(2,366)
Net income (loss) attributable to common stock	$ (1,308)	$ 6,221	$ 14,503	$ 5,395
Denominator (basic)
Weighted average shares of common stock outstanding	70,305,185	69,053,403	70,251,980	42,914,458
Basic EPS	$ (0.02)	$ 0.09	$ 0.21	$ 0.13
Numerator (diluted)
Net income (loss)	$ (1,308)	$ 6,221	$ 14,503	$ 7,761
Less net income allocated to participating securities				(2,253)
Net income (loss) attributable to common stock	$ (1,308)	$ 6,221	$ 14,503	$ 5,508
Denominator (diluted)
Weighted average shares of common stock outstanding	70,305,185	69,053,403	70,251,980	42,914,458
Dilutive effect of stock options and restricted stock units		3,605,000	2,839,000	3,114,000
Weighted average shares of common stock outstanding	70,305,185	72,658,822	73,090,962	46,028,300
Diluted EPS	$ (0.02)	$ 0.09	$ 0.20	$ 0.12
Common stock equivalents excluded from income (loss) per diluted share because of their anti-dilutive effect	3,589,000	143,000	850,000	827,000