ACQUISITION (Details Textuals) (USD $) In Millions, unless otherwise specified			3 Months Ended	8 Months Ended	3 Months Ended		3 Months Ended
	Mar. 31, 2013	Aug. 22, 2012	Mar. 31, 2012 KA Steel [Member]	Aug. 22, 2012 KA Steel [Member]	Mar. 31, 2013 KA Steel [Member] Customers, customer contracts and relationships [Member]	Aug. 22, 2012 KA Steel [Member] Customers, customer contracts and relationships [Member]	Mar. 31, 2013 KA Steel [Member] Other Intangible Assets [Member]	Aug. 22, 2012 KA Steel [Member] Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%		100.00%
Cash consideration for business acquisition				$ 336.6
BusinessAcquisitionPurchasePriceAdjustment				1.9
Cash and cash equivalents				26.2
Face amount of senior secured notes				200.0
Interest rate				5.50%
Long Term Debt Net Proceeds				196.0
Payments of Debt Issuance Costs				4.0
Purchase Price Allocation, Receivables				63.1
Business Acquisition Contracted Receivables Acquired				63.5
Other liabilities	10.0			10.0
Final valuation of intangible assets						128.0		0.4
Acquired Indefinite-lived Intangible Asset, Amount				10.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					10 years 0 months 0 days		4 years 0 months 0 days
Goodwill				119.7
Tax deductible portion of goodwill				119.7
Additional amortization expense related to the fair value of acquired identifiable intangible assets			3.1
Increase of Depreciation Expense Fair Value Adjustment Property Plant And Equipment			0.1
Increase in interest expense due to debt issuance for acquisition			2.8
Eliminatation of intersegment sales			9.5
Pro Forma Decrease Of Tax Provision			$ 1.1