Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 4,260	$ 10,217
Basic weighted average shares (in shares)	52,433,902	52,622,539
Effect of dilutive stock options and restricted stock (in shares)	476,321	567,518
Diluted weighted average shares (in shares)	52,910,223	53,190,057
Basic (usd per share)	$ 0.08	$ 0.19
Diluted (usd per share)	$ 0.08	$ 0.19
Anti-dilutive shares (in shares)	1,676,773	783,965