Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Shares excluded from computation of diluted EPS (in shares)	483,000	274,000	131,000
Basic earnings per share
Net Income	$ 67,275	$ 42,865	$ 29,202
Total weighted average common stock outstanding (in shares)	47,968,942	42,613,086	36,872,007
Net income per share (in dollars per share)	$ 1.40	$ 1.01	$ 0.79
Diluted earnings per share
Net Income	$ 67,275	$ 42,865	$ 29,202
Total weighted average common stock outstanding (in shares)	47,968,942	42,613,086	36,872,007
Add: Dilutive effect of employee restricted stock and stock options (in shares)	779,000	737,000	636,000
Total weighted average diluted stock outstanding (in shares)	48,747,911	43,350,314	37,508,046
Net income per share (in dollars per share)	$ 1.38	$ 0.99	$ 0.78