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Commitments and Contingencies - Contractual Commitments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Jul. 29, 2025 shareholder
Agency Business Commitments
Cash collateral per securitization	$ 5,000
Outstanding letters of credit	5,000
Debt Obligations
2026 (nine months ending December 31, 2026)	3,049,470
2027	4,533,279
2028	1,654,068
2029	1,337,841
2030	659,611
2031	0
Thereafter	154,336
Total	11,388,605
Minimum Annual Operating Lease Payments
2026 (nine months ending December 31, 2026)	8,598
2027	9,912
2028	9,226
2029	8,714
2030	8,756
2031	6,381
Thereafter	4,543
Total	56,130
Total
2026 (nine months ending December 31, 2026)	3,058,068
2027	4,543,191
2028	1,663,294
2029	1,346,555
2030	668,367
2031	6,381
Thereafter	158,879
Total	11,444,735
Operating lease expense	2,900	$ 2,800
Number of purported shareholders filing derivative complaints \| shareholder				2
Land
Total
Outstanding unfunded commitments	1,790,000		$ 1,920,000
Fannie Mae Mortgage
Agency Business Commitments
Minimum liquid assets to be maintained to meet operational liquidity requirements	$ 24,000
Period of funding for collateral requirement	48 months
Letter of credit required	$ 102,300
Letter of credit assigned	70,000
Reserve required to fund additional restricted liquidity over the next 48 months	$ 33,800
Period of additional funding for collateral requirement	48 months
Forward Contracts
Agency Business Commitments
Period of contractual commitment	60 days