Share-Based Compensation - Summary of Grant Date Fair Value of Awards (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Grant date fair value of awards during the period:
Options	$ 1,169	$ 127	$ 12,074	$ 20,071
Restricted stock	806	876	3,316	4,584
Total	1,975	1,003	15,390	24,655
Share-based compensation expense:
Options	2,296	1,522	3,928	6,144
Restricted stock	1,047	857	1,766	1,642
Total	3,343	2,379	5,694	7,786
Income tax benefit/(deficiency) related to share-based compensation [Abstract]
Options	680	488	1,411	731
Restricted stock	160	304	494	455
Total	$ 840	$ 792	$ 1,905	$ 1,186