Share-Based Compensation - Summary of Share-Based Compensation (income) expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Summary of share-based compensation expense
Share-based compensation expense	$ 1,744	$ 1,937	$ 5,960	$ 649
Share-based compensation expense before income tax	1,744	1,937	5,960	649
Income tax benefit	(21)		(76)
Share-based compensation expense, net of income tax	1,723	1,937	5,884	649
Performance-based Restricted Stock Units ("PBRS")
Summary of share-based compensation expense
Share-based compensation expense	(118)	149	488	(2,596)
Share-based compensation expense before income tax	(118)	149	488	(2,596)
Restricted Stock Awards And Restricted Stock Units
Summary of share-based compensation expense
Share-based compensation expense	1,284	1,698	3,964	3,155
Share-based compensation expense before income tax	1,284	1,698	3,964	3,155
Stock Options
Summary of share-based compensation expense
Share-based compensation expense	578	90	1,508	90
Share-based compensation expense before income tax	$ 578	$ 90	$ 1,508	$ 90