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Significant Concentrations (Details Textual) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2008
Dec. 31, 2011
SVA - NEC [Member]
Dec. 31, 2010
SVA - NEC [Member]
Dec. 31, 2013
SVA - NEC [Member]
Dec. 31, 2012
SVA - NEC [Member]
Dec. 31, 2013
Sales Revenue, Services, Net [Member]
Customer A And Its Affiliates [Member]
Dec. 31, 2012
Sales Revenue, Services, Net [Member]
Customer A And Its Affiliates [Member]
Dec. 31, 2011
Sales Revenue, Services, Net [Member]
Customer A And Its Affiliates [Member]
Dec. 31, 2013
Sales Revenue, Services, Net [Member]
Customer Concentration Risk [Member]
Dec. 31, 2012
Sales Revenue, Services, Net [Member]
Customer Concentration Risk [Member]
Dec. 31, 2011
Sales Revenue, Services, Net [Member]
Customer Concentration Risk [Member]
Dec. 31, 2013
Accounts Receivable [Member]
Customer A And Its Affiliates [Member]
Dec. 31, 2012
Accounts Receivable [Member]
Customer A And Its Affiliates [Member]
Dec. 31, 2013
Accounts Receivable [Member]
Customer Concentration Risk [Member]
Dec. 31, 2012
Accounts Receivable [Member]
Customer Concentration Risk [Member]
Concentration Risk [Line Items]                              
Concentration Risk, Percentage           16.90% 11.70% 5.70% 22.60% 34.20% 40.80% 21.50% 14.00% 24.10% 35.10%
Accounts Receivable Gross       $ 15.2 $ 15.2                    
Allowance For Doubtful Accounts Receivable 25.3     15.2 15.2                    
Allowance for Loan and Lease Loss, Recovery of Bad Debts   $ 1.5 $ 8.6