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Share-Based Compensation - Summary of Grant Date Fair Value of Awards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Grant date fair value of awards during the period:
Options	$ 258	$ 244	$ 12,332	$ 20,315
Restricted stock	0	0	3,316	4,584
Total	258	244	15,648	24,899
Share-based compensation expense:
Options	2,208	1,539	6,136	7,683
Restricted stock	644	529	2,410	2,171
Total	2,852	2,068	8,546	9,854
Income tax benefit/(deficiency) related to share-based compensation [Abstract]
Options	579	233	1,990	964
Restricted stock	9	7	503	462
Total	$ 588	$ 240	$ 2,493	$ 1,426

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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