Summary of Significant Accounting Policies - Useful Lives (Details)	12 Months Ended
Dec. 31, 2018
Furniture, fixtures and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	3 years
Furniture, fixtures and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	20 years
Customer relationship intangible asset \| Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Useful life of finite-lived intangible asset	10 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration