Earnings Per Common Share - Schedule of Weighted Average Basic and Diluted Common Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator for basic and diluted earnings per share:
Net income	$ 9,540	$ 9,565	$ 24,653	$ 27,644	$ 23,101	$ 20,190	$ 43,758	$ 70,935
Denominator:
Weighted average number of common shares outstanding - basic (in shares)	74,943			74,700			74,983	74,684
Effect of dilutive securities (in shares)	133			77			187	84
Weighted average number of common shares outstanding - diluted (in shares)	75,076			74,777			75,170	74,768
Basic earnings per common share (in dollars per share)	$ 0.13			$ 0.37			$ 0.58	$ 0.95
Diluted earnings per common share (in dollars per share)	$ 0.13			$ 0.37			$ 0.58	$ 0.95