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Hedging Activities (Narrative) (Details) (USD $)
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3 Months Ended | 12 Months Ended | |
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Mar. 31, 2012
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Mar. 31, 2011
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Dec. 31, 2012
Scenario, Forecast [Member]
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| Expected to reclassify out of accumulated other comprehensive income for the remainder of the year | $ 9,145,000 | ||
| Loss on Fair Value Hedge Ineffectiveness | $ 266,000 | $ 0 | |
| X | ||||||||||
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- Definition
The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Loss recognized in earnings during the reporting period representing the amount of the fair value hedges' ineffectiveness. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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