Segments - Summary of Segment Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segments reporting
Total revenues	$ 171,138	$ 196,289
Depreciation and amortization	(52,247)	(52,009)
Other income (loss), net	891	4,981
Equity in earnings (losses) from unconsolidated ventures	(19,135)	(4,802)
Gain (loss) on sale or disposal of real estate and other assets, net	4,794	4,730
Income (loss) before income taxes	(68,934)	(23,905)
Net income (loss)	(51,905)	(22,627)
Net (income) loss attributable to noncontrolling interests	(10)	(118)
Net income (loss) attributable to HHH	(51,915)	(22,745)
Operating segments
Segments reporting
Total revenues	171,122	196,275
Total operating expenses	(106,583)	(111,925)
Segment operating income (loss)	64,539	84,350
Depreciation and amortization	(51,442)	(51,209)
Interest income (expense), net	(16,218)	(9,850)
Other income (loss), net	411	2,274
Equity in earnings (losses) from unconsolidated ventures	(19,135)	(4,802)
Gain (loss) on sale or disposal of real estate and other assets, net	4,794	4,730
Income (loss) before income taxes	(17,051)	25,493
Corporate
Segments reporting
Corporate income, expenses, and other items	(34,854)	(48,120)
Operating Assets Segment
Segments reporting
Total revenues	110,152	100,925
Operating Assets Segment | Operating segments
Segments reporting
Total revenues	110,152	100,925
Total operating expenses	(51,395)	(47,599)
Segment operating income (loss)	58,757	53,326
Depreciation and amortization	(44,156)	(39,632)
Interest income (expense), net	(33,476)	(28,911)
Other income (loss), net	408	2,282
Equity in earnings (losses) from unconsolidated ventures	5,817	1,905
Gain (loss) on sale or disposal of real estate and other assets, net	4,794	4,730
Income (loss) before income taxes	(7,856)	(6,300)
MPC Segment
Segments reporting
Total revenues	48,875	77,013
MPC Segment | Operating segments
Segments reporting
Total revenues	48,875	77,013
Total operating expenses	(25,049)	(34,351)
Segment operating income (loss)	23,826	42,662
Depreciation and amortization	(110)	(107)
Interest income (expense), net	15,246	15,812
Other income (loss), net	0	(103)
Equity in earnings (losses) from unconsolidated ventures	(14,711)	4,108
Gain (loss) on sale or disposal of real estate and other assets, net	0	0
Income (loss) before income taxes	24,251	62,372
Seaport Segment
Segments reporting
Total revenues	11,502	11,897
Seaport Segment | Operating segments
Segments reporting
Total revenues	11,502	11,897
Total operating expenses	(21,485)	(18,916)
Segment operating income (loss)	(9,983)	(7,019)
Depreciation and amortization	(5,757)	(10,527)
Interest income (expense), net	(2,012)	1,186
Other income (loss), net	0	1
Equity in earnings (losses) from unconsolidated ventures	(10,280)	(10,820)
Gain (loss) on sale or disposal of real estate and other assets, net	0	0
Income (loss) before income taxes	(28,032)	(27,179)
Strategic Developments Segment
Segments reporting
Total revenues	593	6,440
Strategic Developments Segment | Operating segments
Segments reporting
Total revenues	593	6,440
Total operating expenses	(8,654)	(11,059)
Segment operating income (loss)	(8,061)	(4,619)
Depreciation and amortization	(1,419)	(943)
Interest income (expense), net	4,024	2,063
Other income (loss), net	3	94
Equity in earnings (losses) from unconsolidated ventures	39	5
Gain (loss) on sale or disposal of real estate and other assets, net	0	0
Income (loss) before income taxes	$ (5,414)	$ (3,400)