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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net income	$ 14,074	$ 17,453	$ 82,091	$ 65,877
Denominator:
Weighted-average number of common shares outstanding-basic	69,404	67,481	69,348	67,360
Effect of dilutive securities:
Performance and restricted stock awards	130	108	172	125
Weighted-average number of common shares outstanding-diluted	69,534	67,589	69,520	67,485
Earnings per common share:
Basic	$ 0.20	$ 0.26	$ 1.18	$ 0.98
Diluted	$ 0.20	$ 0.26	$ 1.18	$ 0.98