Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers between Level 1, Level 2 and Level 3 securities	$ 0	$ 0
Proceeds from the sales and maturities of securities available-for-sale	0	19,400,000	$ 261,600,000
Net unrealized (losses) gains on trading securities	(2,600,000)	(300,000)	(400,000)
Realized gain	800,000	$ 100,000	$ 1,700,000
Unrealized loss	1,700,000
Collateral deposit with bank	1,900,000
Net realized gains or loss	$ 0
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