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Other Comprehensive Income (OCI) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Sep. 30, 2010
Accumulated Other Comprehensive Loss   
Cash flow hedges$ (32,785)$ (39,137)$ (41,521)
Pension and postretirement plans(132,158)(138,202)(142,308)
Accumulated other comprehensive loss$ (164,943)$ (177,339)$ (183,829)[1]
[1]As Restated, See Note 1