Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Shares excluded from computation of diluted EPS (in shares)	508	491	483
Basic earnings per share
Net Income	$ 77,764	$ 98,739	$ 67,275
Total weighted average common stock outstanding (in shares)	53,502	51,449	47,969
Net income per share (in dollars per share)	$ 1.45	$ 1.92	$ 1.40
Diluted earnings per share
Net Income	$ 77,764	$ 98,739	$ 67,275
Total weighted average common stock outstanding (in shares)	53,502	51,449	47,969
Add: Dilutive effect of employee restricted stock and stock options (in shares)	428	580	779
Total weighted average diluted stock outstanding (in shares)	53,930	52,029	48,748
Net income per share (in dollars per share)	$ 1.44	$ 1.90	$ 1.38