SEGMENT REPORTING Capital Expenditures (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Segment Reporting Information [Line Items]
Capital Expenditures	$ 12,308	[1]	$ 6,806	[1]	$ 22,548	[1]	$ 13,263	[1]
Total Retail
Segment Reporting Information [Line Items]
Capital Expenditures	580	[1]	4,012	[1]	2,527	[1]	7,442	[1]
Total Office
Segment Reporting Information [Line Items]
Capital Expenditures	11,439	[1]	2,441	[1]	19,301	[1]	5,153	[1]
Total Multifamily
Segment Reporting Information [Line Items]
Capital Expenditures	206	[1]	285	[1]	349	[1]	523	[1]
Total Mixed-Use
Segment Reporting Information [Line Items]
Capital Expenditures	$ 83	[1]	$ 68	[1]	$ 371	[1]	$ 145	[1]

[1] Capital expenditures represent cash paid for capital expenditures during the period and include leasing commissions paid.