Segment Information - Additional Information (Details)	12 Months Ended
Dec. 31, 2019 segment
Segment Reporting [Abstract]
Number of Reportable Segments	5
Disclosure on Geographic Areas, Description of Revenue from External Customers	Over 95% of the Company's revenues are generated in the United States ("U.S."). The remaining revenues are generated in the United Kingdom, continental Europe and other international locations.

Disclosure about revenues from external customers (1) attributed to the entity's country of domicile and (2) attributed to all foreign countries in total from which the entity derives revenues.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration