Interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Loans - Investments in Mortgages and Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Investments in loans
Carrying Value	$ 22,002,195	$ 21,627,097
Face Amount	22,332,397	21,922,738
Credit loss allowances:	(397,695)	(440,842)
Total net loans	$ 21,604,500	$ 21,186,255	$ 18,968,615	$ 17,953,021
Residential, fair value option
Investments in loans
Weighted Average Life (in years)	25 years 7 months 6 days	25 years 9 months 18 days
Commercial loans:
Investments in loans
Carrying Value	$ 16,598,490
Credit loss allowances:	(383,736)
Infrastructure loans:
Investments in loans
Carrying Value	3,080,765
Credit loss allowances:	(13,959)
Loans held for investment
Investments in loans
Carrying Value	19,679,255	$ 19,303,554
Face Amount	19,809,133	19,419,886
Credit loss allowances:	(397,695)	(440,842)
Loans held for investment \| Commercial loans:
Investments in loans
Carrying Value	16,598,490	16,464,698
Face Amount	16,669,381	16,529,513
Credit loss allowances:	(383,736)	(426,365)
Total net loans	16,214,754	16,038,333	13,813,047	12,895,064
Loans held for investment \| Infrastructure loans:
Investments in loans
Carrying Value	3,080,765	2,838,856
Face Amount	$ 3,139,752	$ 2,890,373
Weighted Average Life (in years)	5 years	5 years 1 month 6 days
Credit loss allowances:	$ (13,959)	$ (14,477)
Total net loans	$ 3,066,806	$ 2,824,379	2,708,932	2,541,949
Loans held for investment \| Weighted Average Coupon \| Infrastructure loans:
Investments in loans
Weighted Average Coupon	7.40%	7.40%
Loans held-for-sale
Investments in loans
Carrying Value	$ 2,322,940	$ 2,323,543
Face Amount	2,523,264	2,502,852
Credit loss allowances:	0
Total net loans	2,322,940	2,323,543	$ 2,446,636	$ 2,516,008
Loans held-for-sale \| Residential, fair value option
Investments in loans
Carrying Value	2,218,429	2,278,067
Face Amount	2,417,176	2,455,552
Loans held-for-sale \| Commercial, fair value option
Investments in loans
Carrying Value	104,511	45,476
Face Amount	$ 106,088	$ 47,300
Weighted Average Life (in years)	6 years 4 months 24 days	8 years 6 months
Loans held-for-sale \| Weighted Average Coupon \| Residential, fair value option
Investments in loans
Weighted Average Coupon	4.40%	4.40%
Loans held-for-sale \| Weighted Average Coupon \| Commercial, fair value option
Investments in loans
Weighted Average Coupon	6.30%	6.40%
First Mortgage \| Loans held for investment
Investments in loans
Carrying Value	$ 16,234,675	$ 16,086,585
Face Amount	$ 16,303,095	$ 16,148,916
Weighted Average Life (in years)	2 years 8 months 12 days	2 years 8 months 12 days
First Mortgage \| Loans held for investment \| Weighted Average Coupon
Investments in loans
Weighted Average Coupon	6.90%	7.00%
Subordinated Mortgages \| Loans held for investment
Investments in loans
Carrying Value	$ 4,925	$ 15,683
Face Amount	$ 4,925	$ 15,290
Weighted Average Life (in years)	0 years	1 month 6 days
Subordinated Mortgages \| Loans held for investment \| Weighted Average Coupon
Investments in loans
Weighted Average Coupon	0.00%	11.10%
Mezzanine Loans
Investments in loans
Total net loans	$ 1,400,000	$ 1,300,000
Mezzanine Loans \| Loans held for investment
Investments in loans
Carrying Value	307,472	311,175
Face Amount	$ 309,673	$ 313,619
Weighted Average Life (in years)	2 years 6 months	2 years 9 months 18 days
Mezzanine Loans \| Loans held for investment \| Weighted Average Coupon
Investments in loans
Weighted Average Coupon	10.70%	10.80%
Other \| Loans held for investment
Investments in loans
Carrying Value	$ 51,418	$ 51,255
Face Amount	$ 51,688	$ 51,688
Weighted Average Life (in years)	2 years 4 months 24 days	2 years 7 months 6 days
Other \| Loans held for investment \| Weighted Average Coupon
Investments in loans
Weighted Average Coupon	9.10%	9.10%