FAIR VALUE MEASUREMENTS (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	$ 770.8	$ 552.3	$ 610.9
Notes Payable	726.7	536.4	589.6
Fair Value, Inputs, Level 1 [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	0	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	617.8	391.4	486.2
Fair Value, Inputs, Level 3 [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	$ 153.0	$ 160.9	$ 124.7