Earnings Per Share - Schedule of reconciliation of numerators and denominators used to calculate basic and diluted net income per share (Details) - USD ($) $ / shares in Units, $ 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
Earnings Per Share [Abstract]
Net income	$ 21,117	$ 10,159	$ (3,330)	$ 6,815	$ 31,054	$ (15,748)	$ 27,946	$ 22,121
Weighted average shares outstanding - basic (in shares)	38,730,468			38,133,598			38,550,307	37,878,753
Effect of potentially dilutive restricted stock units and options (in shares)	510,506			503,938			688,063	613,212
Weighted average shares outstanding - diluted (in shares)	39,240,974			38,637,536			39,238,370	38,491,965
Basic income per share (in dollars per share)	$ 0.55			$ 0.18			$ 0.72	$ 0.58
Diluted income per share (in dollars per share)	$ 0.54			$ 0.18			$ 0.71	$ 0.57