Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Proceeds from the sales and maturities of securities available-for-sale		$ 0.0	$ 19.4
Net unrealized (losses) gains on trading securities		3.1	$ 0.9
Realized and unrealized losses	$ 2.1	2.8
Collateral deposit with bank	$ 3.2	$ 3.2
Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business combination, contingent consideration payment period		18 months
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business combination, contingent consideration payment period		24 months