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Derivatives and Hedging Activities (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  | 3 Months Ended
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Mar. 31, 2012 | Dec. 31, 2011 | Mar. 31, 2011 | Mar. 31, 2012 12% Senior Notes due February 2014 [Member] | Dec. 31, 2011 12% Senior Notes due February 2014 [Member] | Mar. 31, 2012 5.625 % Senior Notes due July 2013 [Member] | Dec. 31, 2011 5.625 % Senior Notes due July 2013 [Member] | Mar. 31, 2012 Interest Rate Swap [Member] | Dec. 31, 2011 Interest Rate Swap [Member] | Mar. 31, 2012 Foreign Exchange Forward [Member] | Dec. 31, 2011 Foreign Exchange Forward [Member] | Mar. 31, 2012 Designated as Hedging Instrument [Member] | Dec. 31, 2011 Designated as Hedging Instrument [Member] | Mar. 31, 2011 Designated as Hedging Instrument [Member]
Derivatives And Hedging Activities (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mark to market adjustment to record Increase or decrease in the carrying amount of the 12% and 5.625% Senior Notes |  |  |  |  |  |  |  | $ 1.9 | $ 2.0 |  |  |  |  |
Increase (decrease) in interest expense due to interest rate swap |  |  |  |  |  |  |  |  |  |  |  | 0.3 | (1.0) | (1.0)
Increase (decrease) in carrying value due to interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  | 6 |
Estimated fair value of foreign currency forward contract, asset |  |  |  |  |  |  |  |  |  |  | 15 |  |  |
Estimated fair value of foreign currency forward contract, liabilities |  |  |  |  |  |  |  |  |  | 0.2 |  |  |  |
Derivatives and Hedging Activities (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on senior notes |  |  |  | 12.00% | 12.00% | 5.625% | 5.625% |  |  |  |  |  |  |
Terminated an interest rate swap with notional amount interest rate swaps |  | 7 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from termination of interest rate swap | $ 0 |  | $ 1 |  |  |  |  |  |  |  |  |  |  |
Period of LIBOR to pay interest under interest rate Swap agreements | 1 month |  |  |  |  |  |  |  |  |  |  |  |  |
Period of LIBOR to pay interest on remaining interest rate Swap agreements | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum original maturity period of Foreign Currency Forward Contracts | less than 12 months |  |  |  |  |  |  |  |  |  |  |  |  |

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