Goodwill and Intangible Assets - Summary of Indefinite-Lived Intangibles (Details) $ in Millions	Sep. 30, 2021 USD ($)
Indefinite-lived Intangible Assets
Indefinite-lived intangible assets	$ 10.8
Trade names
Indefinite-lived Intangible Assets
Indefinite-lived intangible assets	7.9
State licenses
Indefinite-lived Intangible Assets
Indefinite-lived intangible assets	$ 2.9

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant