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Investments - Summary of Gross Unrealized Losses and Fair Value of Available-For-Sale Investment Securities in Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	$ 203,369	$ 84,390
Less Than 12 Months, Unrealized Losses	(117)	(108)
Total, Estimated Fair Value	203,369	84,390
Total, Unrealized Losses	(117)	(108)
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	92,658
Less Than 12 Months, Unrealized Losses	(23)
Total, Estimated Fair Value	92,658
Total, Unrealized Losses	(23)
Government Sponsored Enterprises Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	110,711	84,390
Less Than 12 Months, Unrealized Losses	(94)	(108)
Total, Estimated Fair Value	110,711	84,390
Total, Unrealized Losses	$ (94)	$ (108)

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