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Share-Based Compensation - Summary of Grant Date Fair Value of Awards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Grant date fair value of awards during the period:
Options	$ 10,905	$ 19,944
Restricted stock	2,510	3,708
Total	13,415	23,652
Share-based compensation expense:
Options	1,632	4,622
Restricted stock	719	785
Total	2,351	5,407
Income tax benefit/(deficiency) related to share-based compensation [Abstract]
Options	731	243
Restricted stock	334	151
Total	$ 1,065	$ 394

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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