Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	$ 0	$ 93,239
Corporate Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	57,878	61,385
US Treasury Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	22,674	10,205
Municipal Debt Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	14,649	14,377
Federal Home Loan Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	5,670	3,562
Certificates of Deposit [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Available-for-sale Securities	$ 3,614	$ 3,710