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GEOGRAPHIC INFORMATION
12 Months Ended
Dec. 31, 2017
Segment Reporting [Abstract]  
GEOGRAPHIC INFORMATION
9. GEOGRAPHIC INFORMATION

 

Net sales and long-lived assets (property, plant and equipment and goodwill and intangible assets) by region were as follows (net sales are attributed to regions based on the locations of customers):

    2017     2016     2015  
    Net Sales     Long-
Lived
Assets
    Net Sales     Long-
Lived
Assets
    Net Sales     Long-
Lived
Assets
 
                                     
North America   $ 527,134     $ 85,707     $ 537,308     $ 68,556     $ 467,161     $ 48,589  
                                                 
Foreign     87,967       3,540       63,811       2,676       73,805       2,505  
                                                 
    $ 615,101     $ 89,247     $ 601,119     $ 71,232     $ 540,966     $ 51,094