Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Abstract]
Commitments related to capital spending activities	$ 147.0
Long-term Purchase Commitment, Time Period	12 months
Term of commitments to purchase goods or services related to the operations of properties	one year or less
Range of remaining compliance periods for tax credit syndication arrangements	less than one year to 12 years
Rent expense	4.2	4.6	5.4
One Canal Project [Member]
Commitments and Contingencies [Abstract]
Number of stories in real estate development project	12
Expected Investment in Development Project	190
Expected Development Period	two and one-half years
Number of homes in apartment communities	310
Net Rentable Area	22,000
Term of ground lease	99 years 0 months
Prepaid Rent	13.0
Redevelopment and capital improvement activities [Member]
Commitments and Contingencies [Abstract]
Commitments related to capital spending activities	$ 82.6