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Segment Reporting - Additional Information (Detail)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Segment Reporting Information [Line Items]    
Number of reportable segments 4  
Sales [Member]
   
Segment Reporting Information [Line Items]    
Revenues from customers 10.00% 10.00%
Sales [Member] | Foreign Country Customers [Member]
   
Segment Reporting Information [Line Items]    
Revenues from customers 6.00% 8.00%