Segments (Summary of Segment Operating Results) (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021 property	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Segments reporting
Total revenues		$ 219,188	$ 154,440	$ 622,225	$ 485,788
Depreciation and amortization		(56,299)	(52,395)	(155,395)	(160,995)
Other income (loss), net		(1,307)	1,284	(12,278)	(793)
Equity in earnings (losses) from real estate and other affiliates		(7,848)	266,838	15,815	269,635
Gain (loss) on sale or disposal of real estate and other assets, net		39,141	108	60,474	46,232
Gain (loss) on extinguishment of debt		(1,577)	(13,166)	(37,543)	(13,166)
Provision for impairment		0	0	(13,068)	(48,738)
Income (loss) before taxes		8,166	208,149	(79,131)	8,020
Net income (loss)		2,117	164,002	(62,425)	4,817
Net (income) loss attributable to noncontrolling interests		1,936	(24,292)	4,725	(24,325)
Net income (loss) attributable to common stockholders, basic		4,053	139,710	(57,700)	(19,508)
Number of properties sold | property	3
Operating segments
Segments reporting
Total revenues		219,085	154,394	621,928	485,637
Total operating expenses		(128,492)	(92,093)	(392,854)	(381,838)
Segment operating income (loss)		90,593	62,301	229,074	103,799
Depreciation and amortization		(55,154)	(50,303)	(151,984)	(155,631)
Interest income (expense), net		(6,438)	(12,759)	(20,169)	(51,889)
Other income (loss), net		(1,414)	1,707	(12,608)	(610)
Equity in earnings (losses) from real estate and other affiliates		(7,848)	266,838	15,815	269,635
Gain (loss) on sale or disposal of real estate and other assets, net		39,141	108	60,474	46,232
Selling profit from sales-type leases			0
Gain (loss) on extinguishment of debt		(1,577)	(13,166)	(2,459)	(13,166)
Provision for impairment			0	(13,068)	(48,738)
Income (loss) before taxes		57,303	254,726	105,075	149,632
Corporate
Segments reporting
Corporate income, expenses and other items		(55,186)	(90,724)	167,500	144,815
Operating Assets
Segments reporting
Total revenues		125,072	81,667	334,933	280,201
Operating Assets | Operating segments
Segments reporting
Total revenues		125,072	81,667	334,933	280,201
Total operating expenses		(61,091)	(47,590)	(161,516)	(142,052)
Segment operating income (loss)		63,981	34,077	173,417	138,149
Depreciation and amortization		(44,224)	(41,395)	(123,850)	(115,479)
Interest income (expense), net		(18,027)	(21,045)	(55,179)	(70,341)
Other income (loss), net		(285)	(17)	(10,539)	150
Equity in earnings (losses) from real estate and other affiliates		(15,108)	962	(36,931)	5,831
Gain (loss) on sale or disposal of real estate and other assets, net		39,141	108	39,141	38,232
Selling profit from sales-type leases			0
Gain (loss) on extinguishment of debt		(573)	(1,521)	(1,455)	(1,521)
Provision for impairment			0	0	(48,738)
Income (loss) before taxes		24,905	(28,831)	(15,396)	(53,717)
Operating Assets | Operating segments | Hospitality Revenue
Segments reporting
Total revenues		14,000	8,100	35,600	27,900
Total operating expenses		(11,700)	(7,600)	(30,500)	(24,800)
MPC Segment
Segments reporting
Total revenues		72,061	52,158	194,926	171,517
MPC Segment | Operating segments
Segments reporting
Total revenues		72,061	52,158	194,926	171,517
Total operating expenses		(35,474)	(23,059)	(92,646)	(78,751)
Segment operating income (loss)		36,587	29,099	102,280	92,766
Depreciation and amortization		(102)	(91)	(272)	(273)
Interest income (expense), net		10,362	9,176	31,734	26,033
Other income (loss), net		0	0	0	0
Equity in earnings (losses) from real estate and other affiliates		8,277	(1,563)	54,568	4,403
Gain (loss) on sale or disposal of real estate and other assets, net		0	0	0	0
Selling profit from sales-type leases			0
Gain (loss) on extinguishment of debt		(1,004)	0	(1,004)	0
Provision for impairment			0	0	0
Income (loss) before taxes		54,120	36,621	187,306	122,929
Seaport Segment
Segments reporting
Total revenues		21,143	4,204	39,494	16,170
Seaport Segment | Operating segments
Segments reporting
Total revenues		21,143	4,204	39,494	16,170
Total operating expenses		(25,219)	(11,522)	(53,721)	(34,297)
Segment operating income (loss)		(4,076)	(7,318)	(14,227)	(18,127)
Depreciation and amortization		(9,087)	(7,174)	(22,926)	(34,825)
Interest income (expense), net		377	(2,811)	666	(12,490)
Other income (loss), net		(1,134)	1,590	(2,088)	(2,187)
Equity in earnings (losses) from real estate and other affiliates		(1,009)	(288)	(1,697)	(8,964)
Gain (loss) on sale or disposal of real estate and other assets, net		0	0	0	0
Selling profit from sales-type leases			0
Gain (loss) on extinguishment of debt		0	(11,645)	0	(11,645)
Provision for impairment			0	0	0
Income (loss) before taxes		(14,929)	(27,646)	(40,272)	(88,238)
Strategic Developments Segment
Segments reporting
Total revenues		809	16,365	52,575	17,749
Strategic Developments Segment | Operating segments
Segments reporting
Total revenues		809	16,365	52,575	17,749
Total operating expenses		(6,708)	(9,922)	(84,971)	(126,738)
Segment operating income (loss)		(5,899)	6,443	(32,396)	(108,989)
Depreciation and amortization		(1,741)	(1,643)	(4,936)	(5,054)
Interest income (expense), net		850	1,921	2,610	4,909
Other income (loss), net		5	134	19	1,427
Equity in earnings (losses) from real estate and other affiliates		(8)	267,727	(125)	268,365
Gain (loss) on sale or disposal of real estate and other assets, net		0	0	21,333	8,000
Selling profit from sales-type leases			0
Gain (loss) on extinguishment of debt		0	0	0	0
Provision for impairment			0	(13,068)	0
Income (loss) before taxes		$ (6,793)	$ 274,582	$ (26,563)	$ 168,658