|
DERIVATIVE FINANCIAL INSTRUMENTS (Details Textuals) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2012
|
Sep. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Sep. 30, 2012
Forward Contracts Buy Foreign Currencies [Member]
|
Dec. 31, 2011
Forward Contracts Buy Foreign Currencies [Member]
|
Sep. 30, 2011
Forward Contracts Buy Foreign Currencies [Member]
|
Sep. 30, 2012
Forward Contracts Sell Foreign Currencies [Member]
|
Dec. 31, 2011
Forward Contracts Sell Foreign Currencies [Member]
|
Sep. 30, 2011
Forward Contracts Sell Foreign Currencies [Member]
|
Dec. 31, 2011
Variable Interest Rate Swaps $75M [Member]
|
Jan. 31, 2009
Variable Interest Rate Swaps $75M [Member]
|
Dec. 31, 2011
Fixed Interest Rate Swap $75M [Member]
|
Sep. 30, 2012
Interest Rate Swaps Designated As Fair Value Hedges [Member]
|
Dec. 31, 2011
Interest Rate Swaps Designated As Fair Value Hedges [Member]
|
Sep. 30, 2011
Interest Rate Swaps Designated As Fair Value Hedges [Member]
|
Sep. 30, 2012
Variable Interest Rate Swaps $125M [Member]
|
Oct. 31, 2011
Variable Interest Rate Swaps $125M [Member]
|
Sep. 30, 2012
Fixed Interest Rate Swaps $125M [Member]
|
|
| Derivative [Line Items] | ||||||||||||||||||||
| Notional amount | $ 0 | $ 0 | $ 0 | $ 8.3 | $ 0 | $ 0 | $ 75.0 | $ 75.0 | $ 0 | $ 80.8 | $ 218.0 | $ 125.0 | $ 125.0 | |||||||
| Amount of gain included in long-term debt | 2.0 | 7.9 | 8.9 | 11.0 | ||||||||||||||||
| Cash flow hedges [Abstract] | ||||||||||||||||||||
| Amount of commodity forward contracts with Wells Fargo | 85.6 | |||||||||||||||||||
| Gain if all open futures contracts were settled | 8.4 | |||||||||||||||||||
| Approximate amount of deferred gains would be reclassified into earnings during the next twelve months | 5.9 | |||||||||||||||||||
| Fair value hedges [Abstract] | ||||||||||||||||||||
| Amount of terminated interest rate swaps | 73.1 | 7.7 | ||||||||||||||||||
| Gain on terminated interest rate swaps | 2.2 | 0.2 | ||||||||||||||||||
| Gain on terminated interest rate swaps on recognized in interest expense upon redemption of our industrial revenue bonds | 0.2 | |||||||||||||||||||
| Credit risk and collateral [Abstract] | ||||||||||||||||||||
| Amounts recognized in other current assets or (accrued liabilities) for cash collateral provided by us to counterparties. | $ 0 | $ 3.9 | $ 7.0 |