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Long-Term Trade And Unbilled Receivables (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Billed and Unbilled Contract Claims Subject to Uncertainty [Abstract]    
Receivables $ 8,284 $ 201
Unbilled receivables 234,292 229,486
Long-term trade and unbilled receivables $ 242,576 $ 229,687