INCOME TAXES (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Feb. 28, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Benefit from Section 45O credit	$ 6.0		$ 6.0
Change in Valuation Allowance	0.8		0.8
Change tax contingencies	1.1		1.2
Benefit related to re-measurement of deferred taxes due to an increase in state tax effective rates	0.8	1.6	1.2	4.9
Expense for Canadian return finalization		0.7
Deferred tax expense related to remeasurement of equity interest				76.0
Percentage of ownership in Sunbelt prior to acquiring remaining 50%						50.00%
Unrecognized Tax Benefits	40.3	41.7	40.3	41.7	37.9		41.5
Impact on the effective tax rate, if recognized	38.5	39.5	38.5	39.5
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 0.8		$ 0.8
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Open Tax Years by Major Tax Jurisdiction			2007 – 2010
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Open Tax Years by Major Tax Jurisdiction			2004 – 2010
Foreign Country [Member]
Income Tax Examination [Line Items]
Open Tax Years by Major Tax Jurisdiction			2007 – 2010
Canadian Provincial Income Tax [Member]
Income Tax Examination [Line Items]
Open Tax Years by Major Tax Jurisdiction			2007 – 2010