NOTES, MORTGAGE NOTES AND OBLIGATIONS PAYABLE - Other Indebtedness (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Debt outstanding	$ 1,096.1	$ 1,100.3
Mortgages [Member]
Debt Instrument [Line Items]
Debt outstanding	1.6	1.8
Weighted average interest rate	2.70%
Collateral amount	4.2
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Debt outstanding	11.5	14.0
Collateral amount	12.0
Amount of debt collateralized	6.8
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt outstanding	$ 0	$ 0
Minimum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Interest rate	5.80%
Maximum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Interest rate	18.70%