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Commitments and Contingencies (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Commitments and Contigencies [Line Items]      
Long-Term Contracts, Contract Price $ 4,418 $ 15,126  
Long-Term Contracts, Commitments Amount 3,980 13,876  
Security Deposit 995 683  
Operating Leases, Rent Expense, Net 2,652 1,812 1,223
Contractual Obligation $ 86,522 $ 121,010  
Lease Expiration Period The lease arrangement will expire gradually from 2014 to 2024.    
Minimum [Member]
     
Commitments and Contigencies [Line Items]      
Sales Commissions Percentage 0.50%    
Maximum [Member]
     
Commitments and Contigencies [Line Items]      
Sales Commissions Percentage 5.00%