Share-Based Compensation - Summary of Grant Date Fair Value of Awards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Grant date fair value of awards during the period:
Options	$ 152	$ 258	$ 6,870	$ 12,332
Performance Awards	32	0	1,622	0
Restricted stock	80	0	2,253	3,316
Total	264	258	10,745	15,648
Share-based compensation expense:
Options	2,167	2,208	6,594	6,136
Performance awards	166	0	355	0
Restricted stock	658	644	1,835	2,410
Total	2,991	2,852	8,784	8,546
Income tax benefit/(deficiency) related to share-based compensation:
Options	440	579	3,010	1,990
Restricted stock	1	9	820	503
Total	$ 441	$ 588	$ 3,830	$ 2,493