Fair Value of Financial Instruments - Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets
Assets, fair value disclosure	$ 958,532	$ 865,572
Liabilities
Liabilities, fair value disclosure	705,457	544,229
Level 2 [Member]
Assets
Assets, fair value disclosure	5,006
Level 3 [Member]
Assets
Assets, fair value disclosure	953,526	865,572
Liabilities
Liabilities, fair value disclosure	705,457	544,229
Carrying Value [Member]
Assets
Assets, fair value disclosure	974,571	867,687
Liabilities
Liabilities, fair value disclosure	706,558	545,528
Loan Receivables Held For Investment [Member]
Assets
Assets, fair value disclosure	953,526	865,572
Loan Receivables Held For Investment [Member] \| Level 3 [Member]
Assets
Assets, fair value disclosure	953,526	865,572
Loan Receivables Held For Investment [Member] \| Carrying Value [Member]
Assets
Assets, fair value disclosure	969,565	867,687
Commercial Debt Securities [Member]
Assets
Assets, fair value disclosure	5,006
Commercial Debt Securities [Member] \| Level 2 [Member]
Assets
Assets, fair value disclosure	5,006
Commercial Debt Securities [Member] \| Level 3 [Member]
Assets
Assets, fair value disclosure	0
Commercial Debt Securities [Member] \| Carrying Value [Member]
Assets
Assets, fair value disclosure	5,006
Credit facility [Member]
Liabilities
Liabilities, fair value disclosure	120,000	38,000
Credit facility [Member] \| Level 3 [Member]
Liabilities
Liabilities, fair value disclosure	120,000	38,000
Credit facility [Member] \| Carrying Value [Member]
Liabilities
Liabilities, fair value disclosure	120,000	38,000
Morgan Stanley Repurchase Agreement [Member]
Liabilities
Liabilities, fair value disclosure	276,939	245,547
Morgan Stanley Repurchase Agreement [Member] \| Level 3 [Member]
Liabilities
Liabilities, fair value disclosure	276,939	245,547
Morgan Stanley Repurchase Agreement [Member] \| Carrying Value [Member]
Liabilities
Liabilities, fair value disclosure	277,811	246,491
Citibank Repurchase Agreement [Member]
Liabilities
Liabilities, fair value disclosure	102,960
Citibank Repurchase Agreement [Member] \| Level 3 [Member]
Liabilities
Liabilities, fair value disclosure	102,960
Citibank Repurchase Agreement [Member] \| Carrying Value [Member]
Liabilities
Liabilities, fair value disclosure	102,960
Notes payable [Member]
Liabilities
Liabilities, fair value disclosure	119,487	119,462
Notes payable [Member] \| Level 3 [Member]
Liabilities
Liabilities, fair value disclosure	119,487	119,462
Notes payable [Member] \| Carrying Value [Member]
Liabilities
Liabilities, fair value disclosure	119,707	119,707
HSBC Loan [Member]
Liabilities
Liabilities, fair value disclosure	86,071	141,220
HSBC Loan [Member] \| Level 3 [Member]
Liabilities
Liabilities, fair value disclosure	86,071	141,220
HSBC Loan [Member] \| Carrying Value [Member]
Liabilities
Liabilities, fair value disclosure	$ 86,080	$ 141,330