Subsequent Events (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	1 Months Ended		1 Months Ended
May 10, 2013	Mar. 31, 2013	May 10, 2013 South Country Center [Member]	Apr. 08, 2013 Kirkwood Mall [Member]	May 10, 2013 Unsecured Term Loan 1 [Member]
Subsequent Event [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				51.00%
Extinguishment of Debt, Amount	$ 299,740	$ 77,099	$ 71,740		$ 228,000

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant