Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 28,737	$ 11,577
Weighted average shares of common stock outstanding	68,509,328	70,521,066
Basic EPS (in dollars per share)	$ 0.42	$ 0.16
Dilutive effect of stock options and restricted stock units	2,405,000	1,225,000
Weighted average shares of common stock outstanding	70,913,970	71,745,753
Diluted EPS (in dollars per share)	$ 0.41	$ 0.16
Common stock equivalents excluded from income per diluted share because of their anti-dilutive effect	636,000	3,396,000