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Accumulated Other Comprehensive Loss
12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss
  (17) Accumulated Other Comprehensive Loss

 

The components of accumulated other comprehensive loss consist of the following:

 

    Year ended December 31,  
    2017     2016     2015  
                   
Net derivative instruments, beginning of year   $ (17 )   $     $  
Net derivative instrument loss, net of tax     54       (17 )      
Net derivative instruments, end of year     37       (17 )      
                         
Cumulative translation adjustments, beginning of year     (57,965 )     (48,091 )     (15,823 )
Translation adjustments     40,096       (9,874 )     (32,268 )
Cumulative translation adjustments, end of year     (17,869 )     (57,965 )     (48,091 )
                         
Accumulated other comprehensive loss   $ (17,832 )   $ (57,982 )   $ (48,091 )