Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Gross carrying amount of amortizable intangible assets	$ 121.2		$ 121.2		$ 108.7
Accumulated amortization	60.6		60.6		53.3
Amortization expense	2.1	$ 3.3	7.2	$ 9.1
Gross carrying amount of property and equipment	26.5		26.5		17.4
Accumulated amortization	9.1		9.1		8.2
Depreciation expense	1.4	$ 0.6	2.7	$ 1.8
Hawaii Reporting Unit
Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 39.0		$ 39.0		$ 39.0