ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued property and real estate taxes	$ 149,563	$ 138,361
Accrued pass-through costs	79,631	68,584
Payroll and related withholdings	68,552	76,141
Accrued rent	53,855	50,951
Amounts payable to tenants	47,376	32,326
Accrued construction costs	38,740	28,587
Accrued income tax payable	45,887	11,551
Accrued treasury stock purchases	7,180	0
Other accrued expenses	283,288	214,062
Total accrued expenses	$ 774,072	$ 620,563