Share-Based Compensation - Summary of Grant Date Fair Value of Awards (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Grant date fair value of awards during the period:
Options	$ 205	$ 1,169	$ 6,718	$ 12,074
Performance Awards	84	0	1,590	0
Restricted stock	773	806	2,173	3,316
Total	1,062	1,975	10,481	15,390
Share-based compensation expense:
Options	2,264	2,296	4,427	3,928
Performance awards	148	0	189	0
Restricted stock	620	1,047	1,177	1,766
Total	3,032	3,343	5,793	5,694
Income tax benefit/(deficiency) related to share-based compensation:
Options	275	680	2,570	1,411
Restricted stock	204	160	819	494
Total	$ 479	$ 840	$ 3,389	$ 1,905