Earnings Per Common Share - Schedule of Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income	$ 14,366	$ 4,876	$ 96,457	$ 70,753
Denominator:
Weighted-average number of common shares outstanding-basic	70,054	68,194	69,582	67,638
Effect of dilutive securities:
Performance and restricted stock awards	75	143	140	131
Weighted-average number of common shares outstanding-diluted	70,129	68,337	69,722	67,769
Earnings per common share:
Basic	$ 0.21	$ 0.07	$ 1.39	$ 1.05
Diluted	$ 0.20	$ 0.07	$ 1.38	$ 1.04