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Pension benefits (Tables)
 12 Months Ended
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]  
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]

The following table summarizes the amounts recognized in accumulated other comprehensive income (loss), net of taxes (in thousands):

 

    Years Ended December 31,  
    2012     2011     2010  
                   
Amortization of transition obligation   $ 90     $ 89     $ 91  
Actuarial loss     (228 )     (373 )     (379 )
Total   $ (138 )   $ (284 )   $ (288 )
                         
Amounts in accumulated other comprehensive income (loss) not yet reflected in net periodic pension cost, net of taxes:                        
                         
Actuarial gain   $ 173     $ 401          
Transition obligation     (216 )     (306 )        
Total   $ (43 )   $ 95          
                         
Amounts in accumulated other comprehensive income (loss) expected to be amortized in 2013 net periodic pension cost, net of taxes:                        
                         
Actuarial loss   $ 329                  
Transition obligation     84                  
Total   $ 413      
Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block]

The following table sets out the status of the non-U.S pension benefits and the amounts (in thousands) recognized in the Company’s consolidated financial statements for each of the three years ended December 31, 2012:

 

Benefit Obligations:

 

Change in the Benefit Obligation:   2012     2011     2010  
                   
Projected benefit obligation at beginning of the year   $ 2,695     $ 2,074     $ 1,392  
Service cost     420       332       244  
Interest cost     218       186       142  
Actuarial loss     186       299       271  
Foreign currency exchange rate changes     101       (100 )     86  
Benefits paid     (68 )     (96 )     (61 )
Projected benefit obligation at end of year   $ 3,552     $ 2,695     $ 2,074
Schedule of Net Benefit Costs [Table Text Block]

Components of Net Periodic Pension Cost:

 

    2012     2011     2010  
                   
Service cost   $ 420     $ 332     $ 244  
Interest cost     218       186       142  
Actuarial (gain) loss recognized     30       (17 )     (4 )
Net periodic pension cost   $ 668     $ 501     $ 382
Schedule of Assumptions Used [Table Text Block]
The assumptions for each of the three years ended December 31, 2012 are as follows:

 

    2012   2011   2010  
Discount rate   5.8%-14%   7.2%-9.5%   8.5%-9.9%  
Rate of increase in compensation levels   7%-9%   7%-9%   7%-9%
Schedule of Expected Benefit Payments [Table Text Block]

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in thousands):

 

Years Ending December 31,      
       
2013   $ 173  
2014     66  
2015     171  
2016     281  
2017     95  
2018 to 2022     1,026  
    $ 1,812