OTHER ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Prepaid Expenses and Other Assets
Condominium inventory	$ 198,352		$ 0
Straight-line rent	50,493		39,136
Intangibles	33,955		34,802
Other	20,364		4,798
Security and escrow deposits	17,670		16,949
Prepaid expenses	16,981		11,731
Equipment, net of accumulated depreciation of $8.3 million and $6.9 million, respectively	15,543		16,955
Tenant incentives and other receivables	8,745		8,482
TIF receivable	2,470		14,444
Federal income tax receivable	2,000		2,198
Interest rate swap derivative assets	346		4,470
Condominium receivables	0		158,516
Prepaid expenses and other assets, net	411,636		370,027
Other equipment accumulated depreciation	8,300		6,900
Decrease in prepaid expenses and other assets	41,600
Increase in condominium inventory	198,400
Decrease condominium receivables	(158,500)
Accounts Payable and Accrued Expenses
Condominium deposit liabilities	263,636		55,975
Construction payables	258,749		217,838
Deferred income	42,734		53,337
Accrued payroll and other employee liabilities	42,591		41,236
Accounts payable and accrued expenses	38,748		35,887
Other	29,283		34,699
Accrued real estate taxes	26,171		22,289
Accrued interest	23,080		20,322
Tenant and other deposits	20,893		18,937
Straight-line ground rent liability	16,870		14,944
Interest rate swap derivative liabilities	16,517		5,961
Above-market ground leases	0		293
Accounts payable and accrued expenses	779,272		521,718
Increase (decrease) in accounts payable and accrued expenses	257,600
Increase in condominium deposits liability	207,700
Increase in construction payables	40,900
Ground Leases below Market
Prepaid Expenses and Other Assets
SID receivables	18,838		26,430
Net carrying amount	18,296		18,647
Leases, Acquired-in-Place
Prepaid Expenses and Other Assets
Net carrying amount	6,539		10,821
Ground Leases above Market
Prepaid Expenses and Other Assets
Net carrying amount	1,044		$ 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	(75,057)	5,600
Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses	$ 165,525	$ 95,000