Goodwill, Deferred Leasing Costs and Other Intangibles - Deferred Leasing Costs, Other Intangible Assets and Intangible Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	$ 850,625	$ 862,150
Deferred leasing and other intangible assets, accumulated amortization	(285,404)	(223,297)
Deferred leasing and other intangible assets, net carrying amount	565,221	638,853
Intangible Liabilities
Intangible liabilities, carrying amount	158,862	174,208
Intangible liabilities, accumulated amortization	(71,667)	(62,724)
Intangible liabilities, gross	87,195	111,484
Deferred leasing costs and lease intangible assets
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	403,826	425,106
Deferred leasing and other intangible assets, accumulated amortization	(158,178)	(123,686)
Deferred leasing and other intangible assets, net carrying amount	245,648	301,420
Investment management intangibles
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	285,233	285,233
Deferred leasing and other intangible assets, accumulated amortization	(114,393)	(96,466)
Deferred leasing and other intangible assets, net carrying amount	170,840	188,767
Customer relationships
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	73,400	71,000
Deferred leasing and other intangible assets, accumulated amortization	(3,296)	(250)
Deferred leasing and other intangible assets, net carrying amount	70,104	70,750
Trade name
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	39,601	39,600
Deferred leasing and other intangible assets, accumulated amortization	(2,380)	(185)
Deferred leasing and other intangible assets, net carrying amount	37,221	39,415
Intangible Liabilities
Colony trade name, indefinite intangible asset	15,500
Other
Deferred Leasing Costs and Intangible Assets
Deferred leasing and other intangible assets, carrying amount	48,565	41,211
Deferred leasing and other intangible assets, accumulated amortization	(7,157)	(2,710)
Deferred leasing and other intangible assets, net carrying amount	$ 41,408	$ 38,501
Minimum | DBH | Trade name
Intangible Liabilities
Useful life	5 years
Maximum | DBH | Trade name
Intangible Liabilities
Useful life	10 years