Debt - Credit Facilities - Narrative (Detail) - Credit facilities - USD ($)	Jun. 30, 2023	Jun. 09, 2023	Jun. 01, 2023	Dec. 31, 2022
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 200,000,000
JPMorgan Chase Bank, N.A.
Debt Instrument [Line Items]
Short-term debt	8,000,000			$ 0
JPMorgan Chase Bank, N.A. | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	100,000,000		$ 100,000,000
Repurchase agreement committed amount			$ 25,000,000
Credit Suisse and Citibank, N.A
Debt Instrument [Line Items]
Short-term debt	28,000,000			28,000,000
Citibank, N.A.
Debt Instrument [Line Items]
Short-term debt	$ 0			$ 3,000,000
Citibank, N.A. | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 100,000,000