Contractual Maturities of Investments in Debt Securities Held (Detail) $ in Thousands	Jun. 30, 2024 USD ($)
Schedule of Available-for-sale Securities
Due within one year, cost	$ 38,718
Due after 1 year through 5 years, cost	27,821
Due after 5 years through 10 years, cost	8,189
Due after 10 years, cost	36,710
Total, cost	111,438
Due within one year, fair market value	38,654
Due after 1 year through 5 years, fair market value	27,285
Due after 5 years through 10 years, fair market value	7,782
Due after 10 years, fair maket value	28,243
Total, fair market value	$ 101,964