Summary of Significant Accounting Policies - Dividends Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
Dec. 17, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 28, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Dividends payable (in dollars per share)					$ 0.01
Dividend Payment	$ (3.3)	$ (3.3)	$ 0.0	$ 0.0

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

Name:	us-gaap_PaymentsOfDividends
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration