Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details 2)

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Fair Value Measurements (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Long term debt, including current portion:    
Carrying value $ 1,622,764 $ 1,606,793
Fair value $ 1,664,568 $ 1,656,797