Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 22, 2019
Goodwill and Intangible Assets [Line Items]
Amortization of intangible assets	$ 6,500,000	$ 7,200,000
Impairment of indefinite-lived intangible asset	0	0
TMR
Goodwill and Intangible Assets [Line Items]
Identifiable indefinite lived intangible assets (insurance licenses)			$ 0	$ 6,800,000
Goodwill and Other Intangible Assets
Goodwill and Intangible Assets [Line Items]
Goodwill, gross	213,200,000	213,200,000	213,300,000
Goodwill, accumulated impairment loss	2,300,000	2,300,000
Goodwill and Other Intangible Assets Included in Investments in Other Ventures, Under Equity Method
Goodwill and Intangible Assets [Line Items]
Goodwill, gross	14,400,000	14,400,000	$ 15,100,000
Goodwill, accumulated impairment loss	$ 4,500,000	$ 4,500,000
Low
Goodwill and Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	3 months 18 days
High
Goodwill and Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	11 years 2 months 12 days
Weighted Average or Actual
Goodwill and Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	4 years 9 months 18 days