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Long-term Debt Long-term Debt (Details) (Polution Control Revenue Bonds Due 2014 [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	May 15, 2012
Polution Control Revenue Bonds Due 2014 [Member]
Debt Instrument [Line Items]
Early Repayment of Subordinated Debt	$ 6.5
Long-term Debt, Variable Interest, Percentage Rate	4.80%
Debt Instrument, Maturity Date	Oct. 01, 2014

The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity.

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