Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Gross carrying amount of amortizable intangible assets	$ 109.7		$ 108.7
Accumulated amortization	56.0		53.3
Amortization expense	2.7	$ 2.8
Gross carrying amount of property and equipment	21.4		17.4
Accumulated amortization	8.9		8.2
Depreciation expense	0.7	$ 0.6
Hawaii Reporting Unit
Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 39.0		$ 39.0