Business Overview and Summary of Significant Accounting Policies - Business Overview and Basis of Presentation (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)
Business Overview and Summary of Significant Accounting Policies
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	$ 1,451

The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration