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Commitments and Contingencies (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Lease commitments for operating leases    
Year 2016 $ 5,315  
Year 2017 4,672  
Year 2018 4,794  
Year 2019 4,610  
Year 2020 and thereafter 15,783  
Subtotal 35,174  
Sublet income (2,079)  
Total lease commitments 33,095  
Lease commitments for capital leases    
Year 2016 420  
Year 2017 149  
Year 2018 13  
Subtotal 582  
Total lease commitments 582  
Lease Commitments    
Year 2016 5,735  
Year 2017 4,821  
Year 2018 4,807  
Year 2019 4,610  
Year 2020 and thereafter 15,783  
Subtotal 35,756  
Sublet income (2,079)  
Total lease commitments 33,677  
Rental expense    
Rental expense incurred 4,700 $ 5,000
Interest expense on capital leases $ 57 $ 72