Fair Value Measurements - Schedule of Fair Value Measurements, Recurring (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities available-for-sale	$ 25,330	$ 23,666
Derivative instruments (included in Other assets)	9,386	8,000
Real estate loans held by consolidated securitization vehicles	1,027,164	1,023,877
Debt fund investments	293,243	152,958
Derivative instruments (included in Other liabilities)	8,799	17,360
Senior obligations of consolidated securitization vehicles	1,027,164	1,023,877
Secured borrowing (included in Other liabilities)	167,423	$ 244,941
One Madison Avenue | National Pension Service of Korea / Hines Interest LP / International Investor
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment in joint venture aggregate maximum ownership percentage		25.00%	25.00%
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities available-for-sale	0	$ 0
Derivative instruments (included in Other assets)	0	0
Real estate loans held by consolidated securitization vehicles	0	0
Debt fund investments	0	0
Derivative instruments (included in Other liabilities)	0	0
Senior obligations of consolidated securitization vehicles	0	0
Secured borrowing (included in Other liabilities)	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities available-for-sale	25,330	23,666
Derivative instruments (included in Other assets)	9,386	8,000
Real estate loans held by consolidated securitization vehicles	903,859	895,998
Debt fund investments	0	0
Derivative instruments (included in Other liabilities)	8,799	17,360
Senior obligations of consolidated securitization vehicles	903,859	895,998
Secured borrowing (included in Other liabilities)	0	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities available-for-sale	0	0
Derivative instruments (included in Other assets)	0	0
Real estate loans held by consolidated securitization vehicles	123,305	127,879
Debt fund investments	293,243	152,958
Derivative instruments (included in Other liabilities)	0	0
Senior obligations of consolidated securitization vehicles	123,305	127,879
Secured borrowing (included in Other liabilities)	167,423	244,941
Level 3 | The Debt Investment Fund
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fund purchased	139,300	146,900
Unrealized gains on investments	$ 500	$ 6,000