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7. Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2014
Fair Value Disclosures [Abstract]  
Acquisition-related Contingent Consideration
    Fair Value Measurements Using Significant  
    Unobservable Inputs(Level 3)  
    Acquisition-related Contingent Consideration  
             
    2014     2013  
             
Balance at January 1   E 236     E 6,533  
Settlement of liability     (236          
Change in fair value     --       (6,297 )
Balance at December 31   E --     E 236