Mortgage and Other Indebtedness (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2011	Sep. 30, 2011 Swap [Member]	Sep. 30, 2011 Interest Rate Caps 1 [Member]	Sep. 30, 2011 Pay fixed/receive variable swap 2 [Member]	Sep. 30, 2011 Pay fixed/receive variable swap 3 [Member]	Sep. 30, 2011 Pay fixed/receive variable swap 4 [Member]
Interest Rate Derivative [Abstract]
Number of Instruments	4	4	2
Notional amount		$ 118,641	$ 133,305	$ 35,905	$ 13,427	$ 11,948

Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Name:	us-gaap_NotionalAmountOfInterestRateDerivatives
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant