Goodwill and Amortizable Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment of goodwill	$ 0.0	$ 0.0
Amortization expense			$ 9.7	$ 11.9	$ 11.4
Hawaii Reporting Unit
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill	$ 39.0	$ 39.0	$ 39.0	$ 39.0