Secured Debt, Net - Additional Information (Detail) - Line of Credit $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) lender	Dec. 31, 2024 USD ($)	Sep. 30, 2024
Debt Instrument [Line Items]
Covenants, EBITDA to fixed charges, in percent	1.25		1.3
Covenants, minimum tangible net worth	$ 3,600,000
Covenants, minimum cash liquidity amount	$ 10,000
Covenants, percentage of recourse indebtedness	0.05
Covenants, indebtedness to total assets, in percent	0.8333
Minimum
Debt Instrument [Line Items]
Covenants, percentage of tangible assets on cash proceeds from equity issuances	0.75
Maximum
Debt Instrument [Line Items]
Covenants, percentage of tangible assets on cash proceeds from equity issuances	0.85
Secured debt, net
Debt Instrument [Line Items]
New borrowings	$ 732,400
Collateral	908,000
Secured debt, net | Secured credit facilities
Debt Instrument [Line Items]
New borrowings	732,359	$ 614,141
Collateral	$ 14,779,404	$ 14,807,821
Number of lenders | lender	14
Remaining borrowing capacity	$ 915,700