Supplemental Detail for Certain Components of Consolidated Balance Sheets (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts payable and accrued expenses
Accrued costs on properties under development	$ 21,125	$ 14,058
Other items	19,759	30,047
Total accounts payable and accrued expenses	70,340	102,511
Acquired lease intangible liabilities, net
Acquired below-market leases	168,380	158,703
Accumulated amortization of acquired below-market leases	(13,185)	(10,453)
Acquired lease intangible liabilities	155,195	148,250
Other liabilities
Rent received in advance	28,208	31,144
Preferred units issued upon acquisition of ARCT	6,750	6,750
Security deposits	5,811	6,136
Total other liabilities	40,769	44,030
Note
Accounts payable and accrued expenses
Interest payable	26,424	55,616
Mortgages
Accounts payable and accrued expenses
Interest payable	$ 3,032	$ 2,790