OTHER ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Prepaid Expenses and Other Assets
Condominium inventory	$ 46,780		$ 0
Straight-line rent	44,560		39,136
Security and escrow deposits	16,986		16,949
Equipment, net of accumulated depreciation of $7.5 million and $6.9 million, respectively	16,380		16,955
Other	13,127		4,798
Prepaid expenses	10,599		11,731
Tenant incentives and other receivables	9,135		8,482
Interest rate swap derivative assets	7,269		4,470
TIF receivable	6,872		14,444
Federal income tax receivable	2,000		2,198
Condominium receivables	0		158,516
Prepaid expenses and other assets, net	262,125		370,027
Accumulated depreciation on other equipment	7,500		6,900
Decrease in prepaid expenses and other assets	107,900
Decrease in condominium receivables	158,500
Decrease in in-place leases	1,700
Decrease in special improvement district receivable	1,200
Decrease in prepaid expense	1,100
Increase in condominium inventory	46,800
Increase in straight line rent	5,400
Increase in derivative assets	2,800
Accounts Payable and Accrued Liabilities [Abstract]
Construction payables	290,991		217,838
Condominium deposit liabilities	203,481		55,975
Deferred income	51,894		53,337
Other	28,154		34,699
Accrued payroll and other employee liabilities	25,790		41,236
Tenant and other deposits	25,138		18,937
Accrued interest	22,135		20,322
Accounts payable and accrued expenses	21,922		35,887
Accrued real estate taxes	17,471		22,289
Straight-line ground rent liability	15,844		14,944
Interest rate swaps	694		5,961
Above-market ground leases	0		293
Accounts payable and accrued expenses	703,514		521,718
Increase in accounts payable and accrued expenses	181,800
Increase in condominium deposits liability	147,500
Increase in construction payables	73,200
Increase in tenant and other deposits	6,200
Decrease in accrued payroll and other employee liabilities	15,400
Decrease in accounts payable and accrued expenses	14,000
Decrease in other	6,500
Decrease in interest rate swap liability	5,300
Decrease in accrued real estate taxes	4,800
Leases, Acquired-in-Place
Prepaid Expenses and Other Assets
Intangibles	34,295		34,802
Net carrying amount	9,091		10,821
Ground Leases below Market
Prepaid Expenses and Other Assets
Special Improvement District receivable	25,206		26,430
Net carrying amount	18,478		18,647
Ground Leases above Market
Prepaid Expenses and Other Assets
Net carrying amount	1,347		$ 1,648
Impact of Adoption of ASC Topic 606 | Accounting Standards Update 2014-09
Prepaid Expenses and Other Assets
Condominium receivables	99,600	$ (154,200)
Prepaid expenses and other assets, net	(444,805)	5,600
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable and accrued expenses	99,600
Accounts payable and accrued expenses	$ 133,264	$ 95,000